1 | /* |
2 | * Atmel maXTouch Touchscreen driver |
3 | * |
4 | * Copyright (C) 2010 Samsung Electronics Co.Ltd |
5 | * Copyright (C) 2011-2014 Atmel Corporation |
6 | * Copyright (C) 2012 Google, Inc. |
7 | * Copyright (C) 2016 Zodiac Inflight Innovations |
8 | * |
9 | * Author: Joonyoung Shim <jy0922.shim@samsung.com> |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify it |
12 | * under the terms of the GNU General Public License as published by the |
13 | * Free Software Foundation; either version 2 of the License, or (at your |
14 | * option) any later version. |
15 | * |
16 | */ |
17 | |
18 | #include <linux/acpi.h> |
19 | #include <linux/dmi.h> |
20 | #include <linux/module.h> |
21 | #include <linux/init.h> |
22 | #include <linux/completion.h> |
23 | #include <linux/delay.h> |
24 | #include <linux/firmware.h> |
25 | #include <linux/i2c.h> |
26 | #include <linux/input/mt.h> |
27 | #include <linux/interrupt.h> |
28 | #include <linux/of.h> |
29 | #include <linux/property.h> |
30 | #include <linux/slab.h> |
31 | #include <linux/gpio/consumer.h> |
32 | #include <asm/unaligned.h> |
33 | #include <media/v4l2-device.h> |
34 | #include <media/v4l2-ioctl.h> |
35 | #include <media/videobuf2-v4l2.h> |
36 | #include <media/videobuf2-vmalloc.h> |
37 | |
38 | /* Firmware files */ |
39 | #define MXT_FW_NAME "maxtouch.fw" |
40 | #define MXT_CFG_NAME "maxtouch.cfg" |
41 | #define MXT_CFG_MAGIC "OBP_RAW V1" |
42 | |
43 | /* Registers */ |
44 | #define MXT_OBJECT_START 0x07 |
45 | #define MXT_OBJECT_SIZE 6 |
46 | #define MXT_INFO_CHECKSUM_SIZE 3 |
47 | #define MXT_MAX_BLOCK_WRITE 256 |
48 | |
49 | /* Object types */ |
50 | #define MXT_DEBUG_DIAGNOSTIC_T37 37 |
51 | #define MXT_GEN_MESSAGE_T5 5 |
52 | #define MXT_GEN_COMMAND_T6 6 |
53 | #define MXT_GEN_POWER_T7 7 |
54 | #define MXT_GEN_ACQUIRE_T8 8 |
55 | #define MXT_GEN_DATASOURCE_T53 53 |
56 | #define MXT_TOUCH_MULTI_T9 9 |
57 | #define MXT_TOUCH_KEYARRAY_T15 15 |
58 | #define MXT_TOUCH_PROXIMITY_T23 23 |
59 | #define MXT_TOUCH_PROXKEY_T52 52 |
60 | #define MXT_PROCI_GRIPFACE_T20 20 |
61 | #define MXT_PROCG_NOISE_T22 22 |
62 | #define MXT_PROCI_ONETOUCH_T24 24 |
63 | #define MXT_PROCI_TWOTOUCH_T27 27 |
64 | #define MXT_PROCI_GRIP_T40 40 |
65 | #define MXT_PROCI_PALM_T41 41 |
66 | #define MXT_PROCI_TOUCHSUPPRESSION_T42 42 |
67 | #define MXT_PROCI_STYLUS_T47 47 |
68 | #define MXT_PROCG_NOISESUPPRESSION_T48 48 |
69 | #define MXT_SPT_COMMSCONFIG_T18 18 |
70 | #define MXT_SPT_GPIOPWM_T19 19 |
71 | #define MXT_SPT_SELFTEST_T25 25 |
72 | #define MXT_SPT_CTECONFIG_T28 28 |
73 | #define MXT_SPT_USERDATA_T38 38 |
74 | #define MXT_SPT_DIGITIZER_T43 43 |
75 | #define MXT_SPT_MESSAGECOUNT_T44 44 |
76 | #define MXT_SPT_CTECONFIG_T46 46 |
77 | #define MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71 71 |
78 | #define MXT_TOUCH_MULTITOUCHSCREEN_T100 100 |
79 | |
80 | /* MXT_GEN_MESSAGE_T5 object */ |
81 | #define MXT_RPTID_NOMSG 0xff |
82 | |
83 | /* MXT_GEN_COMMAND_T6 field */ |
84 | #define MXT_COMMAND_RESET 0 |
85 | #define MXT_COMMAND_BACKUPNV 1 |
86 | #define MXT_COMMAND_CALIBRATE 2 |
87 | #define MXT_COMMAND_REPORTALL 3 |
88 | #define MXT_COMMAND_DIAGNOSTIC 5 |
89 | |
90 | /* Define for T6 status byte */ |
91 | #define MXT_T6_STATUS_RESET BIT(7) |
92 | #define MXT_T6_STATUS_OFL BIT(6) |
93 | #define MXT_T6_STATUS_SIGERR BIT(5) |
94 | #define MXT_T6_STATUS_CAL BIT(4) |
95 | #define MXT_T6_STATUS_CFGERR BIT(3) |
96 | #define MXT_T6_STATUS_COMSERR BIT(2) |
97 | |
98 | /* MXT_GEN_POWER_T7 field */ |
99 | struct t7_config { |
100 | u8 idle; |
101 | u8 active; |
102 | } __packed; |
103 | |
104 | #define MXT_POWER_CFG_RUN 0 |
105 | #define MXT_POWER_CFG_DEEPSLEEP 1 |
106 | |
107 | /* MXT_TOUCH_MULTI_T9 field */ |
108 | #define MXT_T9_CTRL 0 |
109 | #define MXT_T9_XSIZE 3 |
110 | #define MXT_T9_YSIZE 4 |
111 | #define MXT_T9_ORIENT 9 |
112 | #define MXT_T9_RANGE 18 |
113 | |
114 | /* MXT_TOUCH_MULTI_T9 status */ |
115 | #define MXT_T9_UNGRIP BIT(0) |
116 | #define MXT_T9_SUPPRESS BIT(1) |
117 | #define MXT_T9_AMP BIT(2) |
118 | #define MXT_T9_VECTOR BIT(3) |
119 | #define MXT_T9_MOVE BIT(4) |
120 | #define MXT_T9_RELEASE BIT(5) |
121 | #define MXT_T9_PRESS BIT(6) |
122 | #define MXT_T9_DETECT BIT(7) |
123 | |
124 | struct t9_range { |
125 | __le16 x; |
126 | __le16 y; |
127 | } __packed; |
128 | |
129 | /* MXT_TOUCH_MULTI_T9 orient */ |
130 | #define MXT_T9_ORIENT_SWITCH BIT(0) |
131 | #define MXT_T9_ORIENT_INVERTX BIT(1) |
132 | #define MXT_T9_ORIENT_INVERTY BIT(2) |
133 | |
134 | /* MXT_SPT_COMMSCONFIG_T18 */ |
135 | #define MXT_COMMS_CTRL 0 |
136 | #define MXT_COMMS_CMD 1 |
137 | |
138 | /* MXT_DEBUG_DIAGNOSTIC_T37 */ |
139 | #define MXT_DIAGNOSTIC_PAGEUP 0x01 |
140 | #define MXT_DIAGNOSTIC_DELTAS 0x10 |
141 | #define MXT_DIAGNOSTIC_REFS 0x11 |
142 | #define MXT_DIAGNOSTIC_SIZE 128 |
143 | |
144 | #define MXT_FAMILY_1386 160 |
145 | #define MXT1386_COLUMNS 3 |
146 | #define MXT1386_PAGES_PER_COLUMN 8 |
147 | |
148 | struct t37_debug { |
149 | #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
150 | u8 mode; |
151 | u8 page; |
152 | u8 data[MXT_DIAGNOSTIC_SIZE]; |
153 | #endif |
154 | }; |
155 | |
156 | /* Define for MXT_GEN_COMMAND_T6 */ |
157 | #define MXT_BOOT_VALUE 0xa5 |
158 | #define MXT_RESET_VALUE 0x01 |
159 | #define MXT_BACKUP_VALUE 0x55 |
160 | |
161 | /* T100 Multiple Touch Touchscreen */ |
162 | #define MXT_T100_CTRL 0 |
163 | #define MXT_T100_CFG1 1 |
164 | #define MXT_T100_TCHAUX 3 |
165 | #define MXT_T100_XSIZE 9 |
166 | #define MXT_T100_XRANGE 13 |
167 | #define MXT_T100_YSIZE 20 |
168 | #define MXT_T100_YRANGE 24 |
169 | |
170 | #define MXT_T100_CFG_SWITCHXY BIT(5) |
171 | #define MXT_T100_CFG_INVERTY BIT(6) |
172 | #define MXT_T100_CFG_INVERTX BIT(7) |
173 | |
174 | #define MXT_T100_TCHAUX_VECT BIT(0) |
175 | #define MXT_T100_TCHAUX_AMPL BIT(1) |
176 | #define MXT_T100_TCHAUX_AREA BIT(2) |
177 | |
178 | #define MXT_T100_DETECT BIT(7) |
179 | #define MXT_T100_TYPE_MASK 0x70 |
180 | |
181 | enum t100_type { |
182 | MXT_T100_TYPE_FINGER = 1, |
183 | MXT_T100_TYPE_PASSIVE_STYLUS = 2, |
184 | MXT_T100_TYPE_HOVERING_FINGER = 4, |
185 | MXT_T100_TYPE_GLOVE = 5, |
186 | MXT_T100_TYPE_LARGE_TOUCH = 6, |
187 | }; |
188 | |
189 | #define MXT_DISTANCE_ACTIVE_TOUCH 0 |
190 | #define MXT_DISTANCE_HOVERING 1 |
191 | |
192 | #define MXT_TOUCH_MAJOR_DEFAULT 1 |
193 | #define MXT_PRESSURE_DEFAULT 1 |
194 | |
195 | /* Delay times */ |
196 | #define MXT_BACKUP_TIME 50 /* msec */ |
197 | #define MXT_RESET_GPIO_TIME 20 /* msec */ |
198 | #define MXT_RESET_INVALID_CHG 100 /* msec */ |
199 | #define MXT_RESET_TIME 200 /* msec */ |
200 | #define MXT_RESET_TIMEOUT 3000 /* msec */ |
201 | #define MXT_CRC_TIMEOUT 1000 /* msec */ |
202 | #define MXT_FW_RESET_TIME 3000 /* msec */ |
203 | #define MXT_FW_CHG_TIMEOUT 300 /* msec */ |
204 | |
205 | /* Command to unlock bootloader */ |
206 | #define MXT_UNLOCK_CMD_MSB 0xaa |
207 | #define MXT_UNLOCK_CMD_LSB 0xdc |
208 | |
209 | /* Bootloader mode status */ |
210 | #define MXT_WAITING_BOOTLOAD_CMD 0xc0 /* valid 7 6 bit only */ |
211 | #define MXT_WAITING_FRAME_DATA 0x80 /* valid 7 6 bit only */ |
212 | #define MXT_FRAME_CRC_CHECK 0x02 |
213 | #define MXT_FRAME_CRC_FAIL 0x03 |
214 | #define MXT_FRAME_CRC_PASS 0x04 |
215 | #define MXT_APP_CRC_FAIL 0x40 /* valid 7 8 bit only */ |
216 | #define MXT_BOOT_STATUS_MASK 0x3f |
217 | #define MXT_BOOT_EXTENDED_ID BIT(5) |
218 | #define MXT_BOOT_ID_MASK 0x1f |
219 | |
220 | /* Touchscreen absolute values */ |
221 | #define MXT_MAX_AREA 0xff |
222 | |
223 | #define MXT_PIXELS_PER_MM 20 |
224 | |
225 | struct mxt_info { |
226 | u8 family_id; |
227 | u8 variant_id; |
228 | u8 version; |
229 | u8 build; |
230 | u8 matrix_xsize; |
231 | u8 matrix_ysize; |
232 | u8 object_num; |
233 | }; |
234 | |
235 | struct mxt_object { |
236 | u8 type; |
237 | u16 start_address; |
238 | u8 size_minus_one; |
239 | u8 instances_minus_one; |
240 | u8 num_report_ids; |
241 | } __packed; |
242 | |
243 | struct mxt_dbg { |
244 | u16 t37_address; |
245 | u16 diag_cmd_address; |
246 | struct t37_debug *t37_buf; |
247 | unsigned int t37_pages; |
248 | unsigned int t37_nodes; |
249 | |
250 | struct v4l2_device v4l2; |
251 | struct v4l2_pix_format format; |
252 | struct video_device vdev; |
253 | struct vb2_queue queue; |
254 | struct mutex lock; |
255 | int input; |
256 | }; |
257 | |
258 | enum v4l_dbg_inputs { |
259 | MXT_V4L_INPUT_DELTAS, |
260 | MXT_V4L_INPUT_REFS, |
261 | MXT_V4L_INPUT_MAX, |
262 | }; |
263 | |
264 | static const struct v4l2_file_operations mxt_video_fops = { |
265 | .owner = THIS_MODULE, |
266 | .open = v4l2_fh_open, |
267 | .release = vb2_fop_release, |
268 | .unlocked_ioctl = video_ioctl2, |
269 | .read = vb2_fop_read, |
270 | .mmap = vb2_fop_mmap, |
271 | .poll = vb2_fop_poll, |
272 | }; |
273 | |
274 | enum mxt_suspend_mode { |
275 | MXT_SUSPEND_DEEP_SLEEP = 0, |
276 | MXT_SUSPEND_T9_CTRL = 1, |
277 | }; |
278 | |
279 | /* Config update context */ |
280 | struct mxt_cfg { |
281 | u8 *raw; |
282 | size_t raw_size; |
283 | off_t raw_pos; |
284 | |
285 | u8 *mem; |
286 | size_t mem_size; |
287 | int start_ofs; |
288 | |
289 | struct mxt_info info; |
290 | }; |
291 | |
292 | /* Each client has this additional data */ |
293 | struct mxt_data { |
294 | struct i2c_client *client; |
295 | struct input_dev *input_dev; |
296 | char phys[64]; /* device physical location */ |
297 | struct mxt_object *object_table; |
298 | struct mxt_info *info; |
299 | void *raw_info_block; |
300 | unsigned int irq; |
301 | unsigned int max_x; |
302 | unsigned int max_y; |
303 | bool invertx; |
304 | bool inverty; |
305 | bool xy_switch; |
306 | u8 xsize; |
307 | u8 ysize; |
308 | bool in_bootloader; |
309 | u16 mem_size; |
310 | u8 t100_aux_ampl; |
311 | u8 t100_aux_area; |
312 | u8 t100_aux_vect; |
313 | u8 max_reportid; |
314 | u32 config_crc; |
315 | u32 info_crc; |
316 | u8 bootloader_addr; |
317 | u8 *msg_buf; |
318 | u8 t6_status; |
319 | bool update_input; |
320 | u8 last_message_count; |
321 | u8 num_touchids; |
322 | u8 multitouch; |
323 | struct t7_config t7_cfg; |
324 | struct mxt_dbg dbg; |
325 | struct gpio_desc *reset_gpio; |
326 | |
327 | /* Cached parameters from object table */ |
328 | u16 T5_address; |
329 | u8 T5_msg_size; |
330 | u8 T6_reportid; |
331 | u16 T6_address; |
332 | u16 T7_address; |
333 | u16 T71_address; |
334 | u8 T9_reportid_min; |
335 | u8 T9_reportid_max; |
336 | u8 T19_reportid; |
337 | u16 T44_address; |
338 | u8 T100_reportid_min; |
339 | u8 T100_reportid_max; |
340 | |
341 | /* for fw update in bootloader */ |
342 | struct completion bl_completion; |
343 | |
344 | /* for reset handling */ |
345 | struct completion reset_completion; |
346 | |
347 | /* for config update handling */ |
348 | struct completion crc_completion; |
349 | |
350 | u32 *t19_keymap; |
351 | unsigned int t19_num_keys; |
352 | |
353 | enum mxt_suspend_mode suspend_mode; |
354 | }; |
355 | |
356 | struct mxt_vb2_buffer { |
357 | struct vb2_buffer vb; |
358 | struct list_head list; |
359 | }; |
360 | |
361 | static size_t mxt_obj_size(const struct mxt_object *obj) |
362 | { |
363 | return obj->size_minus_one + 1; |
364 | } |
365 | |
366 | static size_t mxt_obj_instances(const struct mxt_object *obj) |
367 | { |
368 | return obj->instances_minus_one + 1; |
369 | } |
370 | |
371 | static bool mxt_object_readable(unsigned int type) |
372 | { |
373 | switch (type) { |
374 | case MXT_GEN_COMMAND_T6: |
375 | case MXT_GEN_POWER_T7: |
376 | case MXT_GEN_ACQUIRE_T8: |
377 | case MXT_GEN_DATASOURCE_T53: |
378 | case MXT_TOUCH_MULTI_T9: |
379 | case MXT_TOUCH_KEYARRAY_T15: |
380 | case MXT_TOUCH_PROXIMITY_T23: |
381 | case MXT_TOUCH_PROXKEY_T52: |
382 | case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
383 | case MXT_PROCI_GRIPFACE_T20: |
384 | case MXT_PROCG_NOISE_T22: |
385 | case MXT_PROCI_ONETOUCH_T24: |
386 | case MXT_PROCI_TWOTOUCH_T27: |
387 | case MXT_PROCI_GRIP_T40: |
388 | case MXT_PROCI_PALM_T41: |
389 | case MXT_PROCI_TOUCHSUPPRESSION_T42: |
390 | case MXT_PROCI_STYLUS_T47: |
391 | case MXT_PROCG_NOISESUPPRESSION_T48: |
392 | case MXT_SPT_COMMSCONFIG_T18: |
393 | case MXT_SPT_GPIOPWM_T19: |
394 | case MXT_SPT_SELFTEST_T25: |
395 | case MXT_SPT_CTECONFIG_T28: |
396 | case MXT_SPT_USERDATA_T38: |
397 | case MXT_SPT_DIGITIZER_T43: |
398 | case MXT_SPT_CTECONFIG_T46: |
399 | case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: |
400 | return true; |
401 | default: |
402 | return false; |
403 | } |
404 | } |
405 | |
406 | static void mxt_dump_message(struct mxt_data *data, u8 *message) |
407 | { |
408 | dev_dbg(&data->client->dev, "message: %*ph\n" , |
409 | data->T5_msg_size, message); |
410 | } |
411 | |
412 | static int mxt_wait_for_completion(struct mxt_data *data, |
413 | struct completion *comp, |
414 | unsigned int timeout_ms) |
415 | { |
416 | struct device *dev = &data->client->dev; |
417 | unsigned long timeout = msecs_to_jiffies(timeout_ms); |
418 | long ret; |
419 | |
420 | ret = wait_for_completion_interruptible_timeout(comp, timeout); |
421 | if (ret < 0) { |
422 | return ret; |
423 | } else if (ret == 0) { |
424 | dev_err(dev, "Wait for completion timed out.\n" ); |
425 | return -ETIMEDOUT; |
426 | } |
427 | return 0; |
428 | } |
429 | |
430 | static int mxt_bootloader_read(struct mxt_data *data, |
431 | u8 *val, unsigned int count) |
432 | { |
433 | int ret; |
434 | struct i2c_msg msg; |
435 | |
436 | msg.addr = data->bootloader_addr; |
437 | msg.flags = data->client->flags & I2C_M_TEN; |
438 | msg.flags |= I2C_M_RD; |
439 | msg.len = count; |
440 | msg.buf = val; |
441 | |
442 | ret = i2c_transfer(data->client->adapter, &msg, 1); |
443 | if (ret == 1) { |
444 | ret = 0; |
445 | } else { |
446 | ret = ret < 0 ? ret : -EIO; |
447 | dev_err(&data->client->dev, "%s: i2c recv failed (%d)\n" , |
448 | __func__, ret); |
449 | } |
450 | |
451 | return ret; |
452 | } |
453 | |
454 | static int mxt_bootloader_write(struct mxt_data *data, |
455 | const u8 * const val, unsigned int count) |
456 | { |
457 | int ret; |
458 | struct i2c_msg msg; |
459 | |
460 | msg.addr = data->bootloader_addr; |
461 | msg.flags = data->client->flags & I2C_M_TEN; |
462 | msg.len = count; |
463 | msg.buf = (u8 *)val; |
464 | |
465 | ret = i2c_transfer(data->client->adapter, &msg, 1); |
466 | if (ret == 1) { |
467 | ret = 0; |
468 | } else { |
469 | ret = ret < 0 ? ret : -EIO; |
470 | dev_err(&data->client->dev, "%s: i2c send failed (%d)\n" , |
471 | __func__, ret); |
472 | } |
473 | |
474 | return ret; |
475 | } |
476 | |
477 | static int mxt_lookup_bootloader_address(struct mxt_data *data, bool retry) |
478 | { |
479 | u8 appmode = data->client->addr; |
480 | u8 bootloader; |
481 | u8 family_id = data->info ? data->info->family_id : 0; |
482 | |
483 | switch (appmode) { |
484 | case 0x4a: |
485 | case 0x4b: |
486 | /* Chips after 1664S use different scheme */ |
487 | if (retry || family_id >= 0xa2) { |
488 | bootloader = appmode - 0x24; |
489 | break; |
490 | } |
491 | /* Fall through - for normal case */ |
492 | case 0x4c: |
493 | case 0x4d: |
494 | case 0x5a: |
495 | case 0x5b: |
496 | bootloader = appmode - 0x26; |
497 | break; |
498 | |
499 | default: |
500 | dev_err(&data->client->dev, |
501 | "Appmode i2c address 0x%02x not found\n" , |
502 | appmode); |
503 | return -EINVAL; |
504 | } |
505 | |
506 | data->bootloader_addr = bootloader; |
507 | return 0; |
508 | } |
509 | |
510 | static int mxt_probe_bootloader(struct mxt_data *data, bool alt_address) |
511 | { |
512 | struct device *dev = &data->client->dev; |
513 | int error; |
514 | u8 val; |
515 | bool crc_failure; |
516 | |
517 | error = mxt_lookup_bootloader_address(data, alt_address); |
518 | if (error) |
519 | return error; |
520 | |
521 | error = mxt_bootloader_read(data, &val, 1); |
522 | if (error) |
523 | return error; |
524 | |
525 | /* Check app crc fail mode */ |
526 | crc_failure = (val & ~MXT_BOOT_STATUS_MASK) == MXT_APP_CRC_FAIL; |
527 | |
528 | dev_err(dev, "Detected bootloader, status:%02X%s\n" , |
529 | val, crc_failure ? ", APP_CRC_FAIL" : "" ); |
530 | |
531 | return 0; |
532 | } |
533 | |
534 | static u8 mxt_get_bootloader_version(struct mxt_data *data, u8 val) |
535 | { |
536 | struct device *dev = &data->client->dev; |
537 | u8 buf[3]; |
538 | |
539 | if (val & MXT_BOOT_EXTENDED_ID) { |
540 | if (mxt_bootloader_read(data, &buf[0], 3) != 0) { |
541 | dev_err(dev, "%s: i2c failure\n" , __func__); |
542 | return val; |
543 | } |
544 | |
545 | dev_dbg(dev, "Bootloader ID:%d Version:%d\n" , buf[1], buf[2]); |
546 | |
547 | return buf[0]; |
548 | } else { |
549 | dev_dbg(dev, "Bootloader ID:%d\n" , val & MXT_BOOT_ID_MASK); |
550 | |
551 | return val; |
552 | } |
553 | } |
554 | |
555 | static int mxt_check_bootloader(struct mxt_data *data, unsigned int state, |
556 | bool wait) |
557 | { |
558 | struct device *dev = &data->client->dev; |
559 | u8 val; |
560 | int ret; |
561 | |
562 | recheck: |
563 | if (wait) { |
564 | /* |
565 | * In application update mode, the interrupt |
566 | * line signals state transitions. We must wait for the |
567 | * CHG assertion before reading the status byte. |
568 | * Once the status byte has been read, the line is deasserted. |
569 | */ |
570 | ret = mxt_wait_for_completion(data, &data->bl_completion, |
571 | MXT_FW_CHG_TIMEOUT); |
572 | if (ret) { |
573 | /* |
574 | * TODO: handle -ERESTARTSYS better by terminating |
575 | * fw update process before returning to userspace |
576 | * by writing length 0x000 to device (iff we are in |
577 | * WAITING_FRAME_DATA state). |
578 | */ |
579 | dev_err(dev, "Update wait error %d\n" , ret); |
580 | return ret; |
581 | } |
582 | } |
583 | |
584 | ret = mxt_bootloader_read(data, &val, 1); |
585 | if (ret) |
586 | return ret; |
587 | |
588 | if (state == MXT_WAITING_BOOTLOAD_CMD) |
589 | val = mxt_get_bootloader_version(data, val); |
590 | |
591 | switch (state) { |
592 | case MXT_WAITING_BOOTLOAD_CMD: |
593 | case MXT_WAITING_FRAME_DATA: |
594 | case MXT_APP_CRC_FAIL: |
595 | val &= ~MXT_BOOT_STATUS_MASK; |
596 | break; |
597 | case MXT_FRAME_CRC_PASS: |
598 | if (val == MXT_FRAME_CRC_CHECK) { |
599 | goto recheck; |
600 | } else if (val == MXT_FRAME_CRC_FAIL) { |
601 | dev_err(dev, "Bootloader CRC fail\n" ); |
602 | return -EINVAL; |
603 | } |
604 | break; |
605 | default: |
606 | return -EINVAL; |
607 | } |
608 | |
609 | if (val != state) { |
610 | dev_err(dev, "Invalid bootloader state %02X != %02X\n" , |
611 | val, state); |
612 | return -EINVAL; |
613 | } |
614 | |
615 | return 0; |
616 | } |
617 | |
618 | static int mxt_send_bootloader_cmd(struct mxt_data *data, bool unlock) |
619 | { |
620 | int ret; |
621 | u8 buf[2]; |
622 | |
623 | if (unlock) { |
624 | buf[0] = MXT_UNLOCK_CMD_LSB; |
625 | buf[1] = MXT_UNLOCK_CMD_MSB; |
626 | } else { |
627 | buf[0] = 0x01; |
628 | buf[1] = 0x01; |
629 | } |
630 | |
631 | ret = mxt_bootloader_write(data, buf, 2); |
632 | if (ret) |
633 | return ret; |
634 | |
635 | return 0; |
636 | } |
637 | |
638 | static int __mxt_read_reg(struct i2c_client *client, |
639 | u16 reg, u16 len, void *val) |
640 | { |
641 | struct i2c_msg xfer[2]; |
642 | u8 buf[2]; |
643 | int ret; |
644 | |
645 | buf[0] = reg & 0xff; |
646 | buf[1] = (reg >> 8) & 0xff; |
647 | |
648 | /* Write register */ |
649 | xfer[0].addr = client->addr; |
650 | xfer[0].flags = 0; |
651 | xfer[0].len = 2; |
652 | xfer[0].buf = buf; |
653 | |
654 | /* Read data */ |
655 | xfer[1].addr = client->addr; |
656 | xfer[1].flags = I2C_M_RD; |
657 | xfer[1].len = len; |
658 | xfer[1].buf = val; |
659 | |
660 | ret = i2c_transfer(client->adapter, xfer, 2); |
661 | if (ret == 2) { |
662 | ret = 0; |
663 | } else { |
664 | if (ret >= 0) |
665 | ret = -EIO; |
666 | dev_err(&client->dev, "%s: i2c transfer failed (%d)\n" , |
667 | __func__, ret); |
668 | } |
669 | |
670 | return ret; |
671 | } |
672 | |
673 | static int __mxt_write_reg(struct i2c_client *client, u16 reg, u16 len, |
674 | const void *val) |
675 | { |
676 | u8 *buf; |
677 | size_t count; |
678 | int ret; |
679 | |
680 | count = len + 2; |
681 | buf = kmalloc(count, GFP_KERNEL); |
682 | if (!buf) |
683 | return -ENOMEM; |
684 | |
685 | buf[0] = reg & 0xff; |
686 | buf[1] = (reg >> 8) & 0xff; |
687 | memcpy(&buf[2], val, len); |
688 | |
689 | ret = i2c_master_send(client, buf, count); |
690 | if (ret == count) { |
691 | ret = 0; |
692 | } else { |
693 | if (ret >= 0) |
694 | ret = -EIO; |
695 | dev_err(&client->dev, "%s: i2c send failed (%d)\n" , |
696 | __func__, ret); |
697 | } |
698 | |
699 | kfree(buf); |
700 | return ret; |
701 | } |
702 | |
703 | static int mxt_write_reg(struct i2c_client *client, u16 reg, u8 val) |
704 | { |
705 | return __mxt_write_reg(client, reg, 1, &val); |
706 | } |
707 | |
708 | static struct mxt_object * |
709 | mxt_get_object(struct mxt_data *data, u8 type) |
710 | { |
711 | struct mxt_object *object; |
712 | int i; |
713 | |
714 | for (i = 0; i < data->info->object_num; i++) { |
715 | object = data->object_table + i; |
716 | if (object->type == type) |
717 | return object; |
718 | } |
719 | |
720 | dev_warn(&data->client->dev, "Invalid object type T%u\n" , type); |
721 | return NULL; |
722 | } |
723 | |
724 | static void mxt_proc_t6_messages(struct mxt_data *data, u8 *msg) |
725 | { |
726 | struct device *dev = &data->client->dev; |
727 | u8 status = msg[1]; |
728 | u32 crc = msg[2] | (msg[3] << 8) | (msg[4] << 16); |
729 | |
730 | if (crc != data->config_crc) { |
731 | data->config_crc = crc; |
732 | dev_dbg(dev, "T6 Config Checksum: 0x%06X\n" , crc); |
733 | } |
734 | |
735 | complete(&data->crc_completion); |
736 | |
737 | /* Detect reset */ |
738 | if (status & MXT_T6_STATUS_RESET) |
739 | complete(&data->reset_completion); |
740 | |
741 | /* Output debug if status has changed */ |
742 | if (status != data->t6_status) |
743 | dev_dbg(dev, "T6 Status 0x%02X%s%s%s%s%s%s%s\n" , |
744 | status, |
745 | status == 0 ? " OK" : "" , |
746 | status & MXT_T6_STATUS_RESET ? " RESET" : "" , |
747 | status & MXT_T6_STATUS_OFL ? " OFL" : "" , |
748 | status & MXT_T6_STATUS_SIGERR ? " SIGERR" : "" , |
749 | status & MXT_T6_STATUS_CAL ? " CAL" : "" , |
750 | status & MXT_T6_STATUS_CFGERR ? " CFGERR" : "" , |
751 | status & MXT_T6_STATUS_COMSERR ? " COMSERR" : "" ); |
752 | |
753 | /* Save current status */ |
754 | data->t6_status = status; |
755 | } |
756 | |
757 | static int mxt_write_object(struct mxt_data *data, |
758 | u8 type, u8 offset, u8 val) |
759 | { |
760 | struct mxt_object *object; |
761 | u16 reg; |
762 | |
763 | object = mxt_get_object(data, type); |
764 | if (!object || offset >= mxt_obj_size(object)) |
765 | return -EINVAL; |
766 | |
767 | reg = object->start_address; |
768 | return mxt_write_reg(data->client, reg + offset, val); |
769 | } |
770 | |
771 | static void mxt_input_button(struct mxt_data *data, u8 *message) |
772 | { |
773 | struct input_dev *input = data->input_dev; |
774 | int i; |
775 | |
776 | for (i = 0; i < data->t19_num_keys; i++) { |
777 | if (data->t19_keymap[i] == KEY_RESERVED) |
778 | continue; |
779 | |
780 | /* Active-low switch */ |
781 | input_report_key(input, data->t19_keymap[i], |
782 | !(message[1] & BIT(i))); |
783 | } |
784 | } |
785 | |
786 | static void mxt_input_sync(struct mxt_data *data) |
787 | { |
788 | input_mt_report_pointer_emulation(data->input_dev, |
789 | data->t19_num_keys); |
790 | input_sync(data->input_dev); |
791 | } |
792 | |
793 | static void mxt_proc_t9_message(struct mxt_data *data, u8 *message) |
794 | { |
795 | struct device *dev = &data->client->dev; |
796 | struct input_dev *input_dev = data->input_dev; |
797 | int id; |
798 | u8 status; |
799 | int x; |
800 | int y; |
801 | int area; |
802 | int amplitude; |
803 | |
804 | id = message[0] - data->T9_reportid_min; |
805 | status = message[1]; |
806 | x = (message[2] << 4) | ((message[4] >> 4) & 0xf); |
807 | y = (message[3] << 4) | ((message[4] & 0xf)); |
808 | |
809 | /* Handle 10/12 bit switching */ |
810 | if (data->max_x < 1024) |
811 | x >>= 2; |
812 | if (data->max_y < 1024) |
813 | y >>= 2; |
814 | |
815 | area = message[5]; |
816 | amplitude = message[6]; |
817 | |
818 | dev_dbg(dev, |
819 | "[%u] %c%c%c%c%c%c%c%c x: %5u y: %5u area: %3u amp: %3u\n" , |
820 | id, |
821 | (status & MXT_T9_DETECT) ? 'D' : '.', |
822 | (status & MXT_T9_PRESS) ? 'P' : '.', |
823 | (status & MXT_T9_RELEASE) ? 'R' : '.', |
824 | (status & MXT_T9_MOVE) ? 'M' : '.', |
825 | (status & MXT_T9_VECTOR) ? 'V' : '.', |
826 | (status & MXT_T9_AMP) ? 'A' : '.', |
827 | (status & MXT_T9_SUPPRESS) ? 'S' : '.', |
828 | (status & MXT_T9_UNGRIP) ? 'U' : '.', |
829 | x, y, area, amplitude); |
830 | |
831 | input_mt_slot(input_dev, id); |
832 | |
833 | if (status & MXT_T9_DETECT) { |
834 | /* |
835 | * Multiple bits may be set if the host is slow to read |
836 | * the status messages, indicating all the events that |
837 | * have happened. |
838 | */ |
839 | if (status & MXT_T9_RELEASE) { |
840 | input_mt_report_slot_state(input_dev, |
841 | MT_TOOL_FINGER, 0); |
842 | mxt_input_sync(data); |
843 | } |
844 | |
845 | /* if active, pressure must be non-zero */ |
846 | if (!amplitude) |
847 | amplitude = MXT_PRESSURE_DEFAULT; |
848 | |
849 | /* Touch active */ |
850 | input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 1); |
851 | input_report_abs(input_dev, ABS_MT_POSITION_X, x); |
852 | input_report_abs(input_dev, ABS_MT_POSITION_Y, y); |
853 | input_report_abs(input_dev, ABS_MT_PRESSURE, amplitude); |
854 | input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, area); |
855 | } else { |
856 | /* Touch no longer active, close out slot */ |
857 | input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, 0); |
858 | } |
859 | |
860 | data->update_input = true; |
861 | } |
862 | |
863 | static void mxt_proc_t100_message(struct mxt_data *data, u8 *message) |
864 | { |
865 | struct device *dev = &data->client->dev; |
866 | struct input_dev *input_dev = data->input_dev; |
867 | int id; |
868 | u8 status; |
869 | u8 type = 0; |
870 | u16 x; |
871 | u16 y; |
872 | int distance = 0; |
873 | int tool = 0; |
874 | u8 major = 0; |
875 | u8 pressure = 0; |
876 | u8 orientation = 0; |
877 | |
878 | id = message[0] - data->T100_reportid_min - 2; |
879 | |
880 | /* ignore SCRSTATUS events */ |
881 | if (id < 0) |
882 | return; |
883 | |
884 | status = message[1]; |
885 | x = get_unaligned_le16(&message[2]); |
886 | y = get_unaligned_le16(&message[4]); |
887 | |
888 | if (status & MXT_T100_DETECT) { |
889 | type = (status & MXT_T100_TYPE_MASK) >> 4; |
890 | |
891 | switch (type) { |
892 | case MXT_T100_TYPE_HOVERING_FINGER: |
893 | tool = MT_TOOL_FINGER; |
894 | distance = MXT_DISTANCE_HOVERING; |
895 | |
896 | if (data->t100_aux_vect) |
897 | orientation = message[data->t100_aux_vect]; |
898 | |
899 | break; |
900 | |
901 | case MXT_T100_TYPE_FINGER: |
902 | case MXT_T100_TYPE_GLOVE: |
903 | tool = MT_TOOL_FINGER; |
904 | distance = MXT_DISTANCE_ACTIVE_TOUCH; |
905 | |
906 | if (data->t100_aux_area) |
907 | major = message[data->t100_aux_area]; |
908 | |
909 | if (data->t100_aux_ampl) |
910 | pressure = message[data->t100_aux_ampl]; |
911 | |
912 | if (data->t100_aux_vect) |
913 | orientation = message[data->t100_aux_vect]; |
914 | |
915 | break; |
916 | |
917 | case MXT_T100_TYPE_PASSIVE_STYLUS: |
918 | tool = MT_TOOL_PEN; |
919 | |
920 | /* |
921 | * Passive stylus is reported with size zero so |
922 | * hardcode. |
923 | */ |
924 | major = MXT_TOUCH_MAJOR_DEFAULT; |
925 | |
926 | if (data->t100_aux_ampl) |
927 | pressure = message[data->t100_aux_ampl]; |
928 | |
929 | break; |
930 | |
931 | case MXT_T100_TYPE_LARGE_TOUCH: |
932 | /* Ignore suppressed touch */ |
933 | break; |
934 | |
935 | default: |
936 | dev_dbg(dev, "Unexpected T100 type\n" ); |
937 | return; |
938 | } |
939 | } |
940 | |
941 | /* |
942 | * Values reported should be non-zero if tool is touching the |
943 | * device |
944 | */ |
945 | if (!pressure && type != MXT_T100_TYPE_HOVERING_FINGER) |
946 | pressure = MXT_PRESSURE_DEFAULT; |
947 | |
948 | input_mt_slot(input_dev, id); |
949 | |
950 | if (status & MXT_T100_DETECT) { |
951 | dev_dbg(dev, "[%u] type:%u x:%u y:%u a:%02X p:%02X v:%02X\n" , |
952 | id, type, x, y, major, pressure, orientation); |
953 | |
954 | input_mt_report_slot_state(input_dev, tool, 1); |
955 | input_report_abs(input_dev, ABS_MT_POSITION_X, x); |
956 | input_report_abs(input_dev, ABS_MT_POSITION_Y, y); |
957 | input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, major); |
958 | input_report_abs(input_dev, ABS_MT_PRESSURE, pressure); |
959 | input_report_abs(input_dev, ABS_MT_DISTANCE, distance); |
960 | input_report_abs(input_dev, ABS_MT_ORIENTATION, orientation); |
961 | } else { |
962 | dev_dbg(dev, "[%u] release\n" , id); |
963 | |
964 | /* close out slot */ |
965 | input_mt_report_slot_state(input_dev, 0, 0); |
966 | } |
967 | |
968 | data->update_input = true; |
969 | } |
970 | |
971 | static int mxt_proc_message(struct mxt_data *data, u8 *message) |
972 | { |
973 | u8 report_id = message[0]; |
974 | |
975 | if (report_id == MXT_RPTID_NOMSG) |
976 | return 0; |
977 | |
978 | if (report_id == data->T6_reportid) { |
979 | mxt_proc_t6_messages(data, message); |
980 | } else if (!data->input_dev) { |
981 | /* |
982 | * Do not report events if input device |
983 | * is not yet registered. |
984 | */ |
985 | mxt_dump_message(data, message); |
986 | } else if (report_id >= data->T9_reportid_min && |
987 | report_id <= data->T9_reportid_max) { |
988 | mxt_proc_t9_message(data, message); |
989 | } else if (report_id >= data->T100_reportid_min && |
990 | report_id <= data->T100_reportid_max) { |
991 | mxt_proc_t100_message(data, message); |
992 | } else if (report_id == data->T19_reportid) { |
993 | mxt_input_button(data, message); |
994 | data->update_input = true; |
995 | } else { |
996 | mxt_dump_message(data, message); |
997 | } |
998 | |
999 | return 1; |
1000 | } |
1001 | |
1002 | static int mxt_read_and_process_messages(struct mxt_data *data, u8 count) |
1003 | { |
1004 | struct device *dev = &data->client->dev; |
1005 | int ret; |
1006 | int i; |
1007 | u8 num_valid = 0; |
1008 | |
1009 | /* Safety check for msg_buf */ |
1010 | if (count > data->max_reportid) |
1011 | return -EINVAL; |
1012 | |
1013 | /* Process remaining messages if necessary */ |
1014 | ret = __mxt_read_reg(data->client, data->T5_address, |
1015 | data->T5_msg_size * count, data->msg_buf); |
1016 | if (ret) { |
1017 | dev_err(dev, "Failed to read %u messages (%d)\n" , count, ret); |
1018 | return ret; |
1019 | } |
1020 | |
1021 | for (i = 0; i < count; i++) { |
1022 | ret = mxt_proc_message(data, |
1023 | data->msg_buf + data->T5_msg_size * i); |
1024 | |
1025 | if (ret == 1) |
1026 | num_valid++; |
1027 | } |
1028 | |
1029 | /* return number of messages read */ |
1030 | return num_valid; |
1031 | } |
1032 | |
1033 | static irqreturn_t mxt_process_messages_t44(struct mxt_data *data) |
1034 | { |
1035 | struct device *dev = &data->client->dev; |
1036 | int ret; |
1037 | u8 count, num_left; |
1038 | |
1039 | /* Read T44 and T5 together */ |
1040 | ret = __mxt_read_reg(data->client, data->T44_address, |
1041 | data->T5_msg_size + 1, data->msg_buf); |
1042 | if (ret) { |
1043 | dev_err(dev, "Failed to read T44 and T5 (%d)\n" , ret); |
1044 | return IRQ_NONE; |
1045 | } |
1046 | |
1047 | count = data->msg_buf[0]; |
1048 | |
1049 | /* |
1050 | * This condition may be caused by the CHG line being configured in |
1051 | * Mode 0. It results in unnecessary I2C operations but it is benign. |
1052 | */ |
1053 | if (count == 0) |
1054 | return IRQ_NONE; |
1055 | |
1056 | if (count > data->max_reportid) { |
1057 | dev_warn(dev, "T44 count %d exceeded max report id\n" , count); |
1058 | count = data->max_reportid; |
1059 | } |
1060 | |
1061 | /* Process first message */ |
1062 | ret = mxt_proc_message(data, data->msg_buf + 1); |
1063 | if (ret < 0) { |
1064 | dev_warn(dev, "Unexpected invalid message\n" ); |
1065 | return IRQ_NONE; |
1066 | } |
1067 | |
1068 | num_left = count - 1; |
1069 | |
1070 | /* Process remaining messages if necessary */ |
1071 | if (num_left) { |
1072 | ret = mxt_read_and_process_messages(data, num_left); |
1073 | if (ret < 0) |
1074 | goto end; |
1075 | else if (ret != num_left) |
1076 | dev_warn(dev, "Unexpected invalid message\n" ); |
1077 | } |
1078 | |
1079 | end: |
1080 | if (data->update_input) { |
1081 | mxt_input_sync(data); |
1082 | data->update_input = false; |
1083 | } |
1084 | |
1085 | return IRQ_HANDLED; |
1086 | } |
1087 | |
1088 | static int mxt_process_messages_until_invalid(struct mxt_data *data) |
1089 | { |
1090 | struct device *dev = &data->client->dev; |
1091 | int count, read; |
1092 | u8 tries = 2; |
1093 | |
1094 | count = data->max_reportid; |
1095 | |
1096 | /* Read messages until we force an invalid */ |
1097 | do { |
1098 | read = mxt_read_and_process_messages(data, count); |
1099 | if (read < count) |
1100 | return 0; |
1101 | } while (--tries); |
1102 | |
1103 | if (data->update_input) { |
1104 | mxt_input_sync(data); |
1105 | data->update_input = false; |
1106 | } |
1107 | |
1108 | dev_err(dev, "CHG pin isn't cleared\n" ); |
1109 | return -EBUSY; |
1110 | } |
1111 | |
1112 | static irqreturn_t mxt_process_messages(struct mxt_data *data) |
1113 | { |
1114 | int total_handled, num_handled; |
1115 | u8 count = data->last_message_count; |
1116 | |
1117 | if (count < 1 || count > data->max_reportid) |
1118 | count = 1; |
1119 | |
1120 | /* include final invalid message */ |
1121 | total_handled = mxt_read_and_process_messages(data, count + 1); |
1122 | if (total_handled < 0) |
1123 | return IRQ_NONE; |
1124 | /* if there were invalid messages, then we are done */ |
1125 | else if (total_handled <= count) |
1126 | goto update_count; |
1127 | |
1128 | /* keep reading two msgs until one is invalid or reportid limit */ |
1129 | do { |
1130 | num_handled = mxt_read_and_process_messages(data, 2); |
1131 | if (num_handled < 0) |
1132 | return IRQ_NONE; |
1133 | |
1134 | total_handled += num_handled; |
1135 | |
1136 | if (num_handled < 2) |
1137 | break; |
1138 | } while (total_handled < data->num_touchids); |
1139 | |
1140 | update_count: |
1141 | data->last_message_count = total_handled; |
1142 | |
1143 | if (data->update_input) { |
1144 | mxt_input_sync(data); |
1145 | data->update_input = false; |
1146 | } |
1147 | |
1148 | return IRQ_HANDLED; |
1149 | } |
1150 | |
1151 | static irqreturn_t mxt_interrupt(int irq, void *dev_id) |
1152 | { |
1153 | struct mxt_data *data = dev_id; |
1154 | |
1155 | if (data->in_bootloader) { |
1156 | /* bootloader state transition completion */ |
1157 | complete(&data->bl_completion); |
1158 | return IRQ_HANDLED; |
1159 | } |
1160 | |
1161 | if (!data->object_table) |
1162 | return IRQ_HANDLED; |
1163 | |
1164 | if (data->T44_address) { |
1165 | return mxt_process_messages_t44(data); |
1166 | } else { |
1167 | return mxt_process_messages(data); |
1168 | } |
1169 | } |
1170 | |
1171 | static int mxt_t6_command(struct mxt_data *data, u16 cmd_offset, |
1172 | u8 value, bool wait) |
1173 | { |
1174 | u16 reg; |
1175 | u8 command_register; |
1176 | int timeout_counter = 0; |
1177 | int ret; |
1178 | |
1179 | reg = data->T6_address + cmd_offset; |
1180 | |
1181 | ret = mxt_write_reg(data->client, reg, value); |
1182 | if (ret) |
1183 | return ret; |
1184 | |
1185 | if (!wait) |
1186 | return 0; |
1187 | |
1188 | do { |
1189 | msleep(20); |
1190 | ret = __mxt_read_reg(data->client, reg, 1, &command_register); |
1191 | if (ret) |
1192 | return ret; |
1193 | } while (command_register != 0 && timeout_counter++ <= 100); |
1194 | |
1195 | if (timeout_counter > 100) { |
1196 | dev_err(&data->client->dev, "Command failed!\n" ); |
1197 | return -EIO; |
1198 | } |
1199 | |
1200 | return 0; |
1201 | } |
1202 | |
1203 | static int mxt_acquire_irq(struct mxt_data *data) |
1204 | { |
1205 | int error; |
1206 | |
1207 | enable_irq(data->irq); |
1208 | |
1209 | error = mxt_process_messages_until_invalid(data); |
1210 | if (error) |
1211 | return error; |
1212 | |
1213 | return 0; |
1214 | } |
1215 | |
1216 | static int mxt_soft_reset(struct mxt_data *data) |
1217 | { |
1218 | struct device *dev = &data->client->dev; |
1219 | int ret = 0; |
1220 | |
1221 | dev_info(dev, "Resetting device\n" ); |
1222 | |
1223 | disable_irq(data->irq); |
1224 | |
1225 | reinit_completion(&data->reset_completion); |
1226 | |
1227 | ret = mxt_t6_command(data, MXT_COMMAND_RESET, MXT_RESET_VALUE, false); |
1228 | if (ret) |
1229 | return ret; |
1230 | |
1231 | /* Ignore CHG line for 100ms after reset */ |
1232 | msleep(MXT_RESET_INVALID_CHG); |
1233 | |
1234 | mxt_acquire_irq(data); |
1235 | |
1236 | ret = mxt_wait_for_completion(data, &data->reset_completion, |
1237 | MXT_RESET_TIMEOUT); |
1238 | if (ret) |
1239 | return ret; |
1240 | |
1241 | return 0; |
1242 | } |
1243 | |
1244 | static void mxt_update_crc(struct mxt_data *data, u8 cmd, u8 value) |
1245 | { |
1246 | /* |
1247 | * On failure, CRC is set to 0 and config will always be |
1248 | * downloaded. |
1249 | */ |
1250 | data->config_crc = 0; |
1251 | reinit_completion(&data->crc_completion); |
1252 | |
1253 | mxt_t6_command(data, cmd, value, true); |
1254 | |
1255 | /* |
1256 | * Wait for crc message. On failure, CRC is set to 0 and config will |
1257 | * always be downloaded. |
1258 | */ |
1259 | mxt_wait_for_completion(data, &data->crc_completion, MXT_CRC_TIMEOUT); |
1260 | } |
1261 | |
1262 | static void mxt_calc_crc24(u32 *crc, u8 firstbyte, u8 secondbyte) |
1263 | { |
1264 | static const unsigned int crcpoly = 0x80001B; |
1265 | u32 result; |
1266 | u32 data_word; |
1267 | |
1268 | data_word = (secondbyte << 8) | firstbyte; |
1269 | result = ((*crc << 1) ^ data_word); |
1270 | |
1271 | if (result & 0x1000000) |
1272 | result ^= crcpoly; |
1273 | |
1274 | *crc = result; |
1275 | } |
1276 | |
1277 | static u32 mxt_calculate_crc(u8 *base, off_t start_off, off_t end_off) |
1278 | { |
1279 | u32 crc = 0; |
1280 | u8 *ptr = base + start_off; |
1281 | u8 *last_val = base + end_off - 1; |
1282 | |
1283 | if (end_off < start_off) |
1284 | return -EINVAL; |
1285 | |
1286 | while (ptr < last_val) { |
1287 | mxt_calc_crc24(&crc, *ptr, *(ptr + 1)); |
1288 | ptr += 2; |
1289 | } |
1290 | |
1291 | /* if len is odd, fill the last byte with 0 */ |
1292 | if (ptr == last_val) |
1293 | mxt_calc_crc24(&crc, *ptr, 0); |
1294 | |
1295 | /* Mask to 24-bit */ |
1296 | crc &= 0x00FFFFFF; |
1297 | |
1298 | return crc; |
1299 | } |
1300 | |
1301 | static int mxt_prepare_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) |
1302 | { |
1303 | struct device *dev = &data->client->dev; |
1304 | struct mxt_object *object; |
1305 | unsigned int type, instance, size, byte_offset; |
1306 | int offset; |
1307 | int ret; |
1308 | int i; |
1309 | u16 reg; |
1310 | u8 val; |
1311 | |
1312 | while (cfg->raw_pos < cfg->raw_size) { |
1313 | /* Read type, instance, length */ |
1314 | ret = sscanf(cfg->raw + cfg->raw_pos, "%x %x %x%n" , |
1315 | &type, &instance, &size, &offset); |
1316 | if (ret == 0) { |
1317 | /* EOF */ |
1318 | break; |
1319 | } else if (ret != 3) { |
1320 | dev_err(dev, "Bad format: failed to parse object\n" ); |
1321 | return -EINVAL; |
1322 | } |
1323 | cfg->raw_pos += offset; |
1324 | |
1325 | object = mxt_get_object(data, type); |
1326 | if (!object) { |
1327 | /* Skip object */ |
1328 | for (i = 0; i < size; i++) { |
1329 | ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n" , |
1330 | &val, &offset); |
1331 | if (ret != 1) { |
1332 | dev_err(dev, "Bad format in T%d at %d\n" , |
1333 | type, i); |
1334 | return -EINVAL; |
1335 | } |
1336 | cfg->raw_pos += offset; |
1337 | } |
1338 | continue; |
1339 | } |
1340 | |
1341 | if (size > mxt_obj_size(object)) { |
1342 | /* |
1343 | * Either we are in fallback mode due to wrong |
1344 | * config or config from a later fw version, |
1345 | * or the file is corrupt or hand-edited. |
1346 | */ |
1347 | dev_warn(dev, "Discarding %zu byte(s) in T%u\n" , |
1348 | size - mxt_obj_size(object), type); |
1349 | } else if (mxt_obj_size(object) > size) { |
1350 | /* |
1351 | * If firmware is upgraded, new bytes may be added to |
1352 | * end of objects. It is generally forward compatible |
1353 | * to zero these bytes - previous behaviour will be |
1354 | * retained. However this does invalidate the CRC and |
1355 | * will force fallback mode until the configuration is |
1356 | * updated. We warn here but do nothing else - the |
1357 | * malloc has zeroed the entire configuration. |
1358 | */ |
1359 | dev_warn(dev, "Zeroing %zu byte(s) in T%d\n" , |
1360 | mxt_obj_size(object) - size, type); |
1361 | } |
1362 | |
1363 | if (instance >= mxt_obj_instances(object)) { |
1364 | dev_err(dev, "Object instances exceeded!\n" ); |
1365 | return -EINVAL; |
1366 | } |
1367 | |
1368 | reg = object->start_address + mxt_obj_size(object) * instance; |
1369 | |
1370 | for (i = 0; i < size; i++) { |
1371 | ret = sscanf(cfg->raw + cfg->raw_pos, "%hhx%n" , |
1372 | &val, |
1373 | &offset); |
1374 | if (ret != 1) { |
1375 | dev_err(dev, "Bad format in T%d at %d\n" , |
1376 | type, i); |
1377 | return -EINVAL; |
1378 | } |
1379 | cfg->raw_pos += offset; |
1380 | |
1381 | if (i > mxt_obj_size(object)) |
1382 | continue; |
1383 | |
1384 | byte_offset = reg + i - cfg->start_ofs; |
1385 | |
1386 | if (byte_offset >= 0 && byte_offset < cfg->mem_size) { |
1387 | *(cfg->mem + byte_offset) = val; |
1388 | } else { |
1389 | dev_err(dev, "Bad object: reg:%d, T%d, ofs=%d\n" , |
1390 | reg, object->type, byte_offset); |
1391 | return -EINVAL; |
1392 | } |
1393 | } |
1394 | } |
1395 | |
1396 | return 0; |
1397 | } |
1398 | |
1399 | static int mxt_upload_cfg_mem(struct mxt_data *data, struct mxt_cfg *cfg) |
1400 | { |
1401 | unsigned int byte_offset = 0; |
1402 | int error; |
1403 | |
1404 | /* Write configuration as blocks */ |
1405 | while (byte_offset < cfg->mem_size) { |
1406 | unsigned int size = cfg->mem_size - byte_offset; |
1407 | |
1408 | if (size > MXT_MAX_BLOCK_WRITE) |
1409 | size = MXT_MAX_BLOCK_WRITE; |
1410 | |
1411 | error = __mxt_write_reg(data->client, |
1412 | cfg->start_ofs + byte_offset, |
1413 | size, cfg->mem + byte_offset); |
1414 | if (error) { |
1415 | dev_err(&data->client->dev, |
1416 | "Config write error, ret=%d\n" , error); |
1417 | return error; |
1418 | } |
1419 | |
1420 | byte_offset += size; |
1421 | } |
1422 | |
1423 | return 0; |
1424 | } |
1425 | |
1426 | static int mxt_init_t7_power_cfg(struct mxt_data *data); |
1427 | |
1428 | /* |
1429 | * mxt_update_cfg - download configuration to chip |
1430 | * |
1431 | * Atmel Raw Config File Format |
1432 | * |
1433 | * The first four lines of the raw config file contain: |
1434 | * 1) Version |
1435 | * 2) Chip ID Information (first 7 bytes of device memory) |
1436 | * 3) Chip Information Block 24-bit CRC Checksum |
1437 | * 4) Chip Configuration 24-bit CRC Checksum |
1438 | * |
1439 | * The rest of the file consists of one line per object instance: |
1440 | * <TYPE> <INSTANCE> <SIZE> <CONTENTS> |
1441 | * |
1442 | * <TYPE> - 2-byte object type as hex |
1443 | * <INSTANCE> - 2-byte object instance number as hex |
1444 | * <SIZE> - 2-byte object size as hex |
1445 | * <CONTENTS> - array of <SIZE> 1-byte hex values |
1446 | */ |
1447 | static int mxt_update_cfg(struct mxt_data *data, const struct firmware *fw) |
1448 | { |
1449 | struct device *dev = &data->client->dev; |
1450 | struct mxt_cfg cfg; |
1451 | int ret; |
1452 | int offset; |
1453 | int i; |
1454 | u32 info_crc, config_crc, calculated_crc; |
1455 | u16 crc_start = 0; |
1456 | |
1457 | /* Make zero terminated copy of the OBP_RAW file */ |
1458 | cfg.raw = kmemdup_nul(fw->data, fw->size, GFP_KERNEL); |
1459 | if (!cfg.raw) |
1460 | return -ENOMEM; |
1461 | |
1462 | cfg.raw_size = fw->size; |
1463 | |
1464 | mxt_update_crc(data, MXT_COMMAND_REPORTALL, 1); |
1465 | |
1466 | if (strncmp(cfg.raw, MXT_CFG_MAGIC, strlen(MXT_CFG_MAGIC))) { |
1467 | dev_err(dev, "Unrecognised config file\n" ); |
1468 | ret = -EINVAL; |
1469 | goto release_raw; |
1470 | } |
1471 | |
1472 | cfg.raw_pos = strlen(MXT_CFG_MAGIC); |
1473 | |
1474 | /* Load information block and check */ |
1475 | for (i = 0; i < sizeof(struct mxt_info); i++) { |
1476 | ret = sscanf(cfg.raw + cfg.raw_pos, "%hhx%n" , |
1477 | (unsigned char *)&cfg.info + i, |
1478 | &offset); |
1479 | if (ret != 1) { |
1480 | dev_err(dev, "Bad format\n" ); |
1481 | ret = -EINVAL; |
1482 | goto release_raw; |
1483 | } |
1484 | |
1485 | cfg.raw_pos += offset; |
1486 | } |
1487 | |
1488 | if (cfg.info.family_id != data->info->family_id) { |
1489 | dev_err(dev, "Family ID mismatch!\n" ); |
1490 | ret = -EINVAL; |
1491 | goto release_raw; |
1492 | } |
1493 | |
1494 | if (cfg.info.variant_id != data->info->variant_id) { |
1495 | dev_err(dev, "Variant ID mismatch!\n" ); |
1496 | ret = -EINVAL; |
1497 | goto release_raw; |
1498 | } |
1499 | |
1500 | /* Read CRCs */ |
1501 | ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n" , &info_crc, &offset); |
1502 | if (ret != 1) { |
1503 | dev_err(dev, "Bad format: failed to parse Info CRC\n" ); |
1504 | ret = -EINVAL; |
1505 | goto release_raw; |
1506 | } |
1507 | cfg.raw_pos += offset; |
1508 | |
1509 | ret = sscanf(cfg.raw + cfg.raw_pos, "%x%n" , &config_crc, &offset); |
1510 | if (ret != 1) { |
1511 | dev_err(dev, "Bad format: failed to parse Config CRC\n" ); |
1512 | ret = -EINVAL; |
1513 | goto release_raw; |
1514 | } |
1515 | cfg.raw_pos += offset; |
1516 | |
1517 | /* |
1518 | * The Info Block CRC is calculated over mxt_info and the object |
1519 | * table. If it does not match then we are trying to load the |
1520 | * configuration from a different chip or firmware version, so |
1521 | * the configuration CRC is invalid anyway. |
1522 | */ |
1523 | if (info_crc == data->info_crc) { |
1524 | if (config_crc == 0 || data->config_crc == 0) { |
1525 | dev_info(dev, "CRC zero, attempting to apply config\n" ); |
1526 | } else if (config_crc == data->config_crc) { |
1527 | dev_dbg(dev, "Config CRC 0x%06X: OK\n" , |
1528 | data->config_crc); |
1529 | return 0; |
1530 | } else { |
1531 | dev_info(dev, "Config CRC 0x%06X: does not match file 0x%06X\n" , |
1532 | data->config_crc, config_crc); |
1533 | } |
1534 | } else { |
1535 | dev_warn(dev, |
1536 | "Warning: Info CRC error - device=0x%06X file=0x%06X\n" , |
1537 | data->info_crc, info_crc); |
1538 | } |
1539 | |
1540 | /* Malloc memory to store configuration */ |
1541 | cfg.start_ofs = MXT_OBJECT_START + |
1542 | data->info->object_num * sizeof(struct mxt_object) + |
1543 | MXT_INFO_CHECKSUM_SIZE; |
1544 | cfg.mem_size = data->mem_size - cfg.start_ofs; |
1545 | cfg.mem = kzalloc(cfg.mem_size, GFP_KERNEL); |
1546 | if (!cfg.mem) { |
1547 | ret = -ENOMEM; |
1548 | goto release_raw; |
1549 | } |
1550 | |
1551 | ret = mxt_prepare_cfg_mem(data, &cfg); |
1552 | if (ret) |
1553 | goto release_mem; |
1554 | |
1555 | /* Calculate crc of the received configs (not the raw config file) */ |
1556 | if (data->T71_address) |
1557 | crc_start = data->T71_address; |
1558 | else if (data->T7_address) |
1559 | crc_start = data->T7_address; |
1560 | else |
1561 | dev_warn(dev, "Could not find CRC start\n" ); |
1562 | |
1563 | if (crc_start > cfg.start_ofs) { |
1564 | calculated_crc = mxt_calculate_crc(cfg.mem, |
1565 | crc_start - cfg.start_ofs, |
1566 | cfg.mem_size); |
1567 | |
1568 | if (config_crc > 0 && config_crc != calculated_crc) |
1569 | dev_warn(dev, "Config CRC in file inconsistent, calculated=%06X, file=%06X\n" , |
1570 | calculated_crc, config_crc); |
1571 | } |
1572 | |
1573 | ret = mxt_upload_cfg_mem(data, &cfg); |
1574 | if (ret) |
1575 | goto release_mem; |
1576 | |
1577 | mxt_update_crc(data, MXT_COMMAND_BACKUPNV, MXT_BACKUP_VALUE); |
1578 | |
1579 | ret = mxt_soft_reset(data); |
1580 | if (ret) |
1581 | goto release_mem; |
1582 | |
1583 | dev_info(dev, "Config successfully updated\n" ); |
1584 | |
1585 | /* T7 config may have changed */ |
1586 | mxt_init_t7_power_cfg(data); |
1587 | |
1588 | release_mem: |
1589 | kfree(cfg.mem); |
1590 | release_raw: |
1591 | kfree(cfg.raw); |
1592 | return ret; |
1593 | } |
1594 | |
1595 | static void mxt_free_input_device(struct mxt_data *data) |
1596 | { |
1597 | if (data->input_dev) { |
1598 | input_unregister_device(data->input_dev); |
1599 | data->input_dev = NULL; |
1600 | } |
1601 | } |
1602 | |
1603 | static void mxt_free_object_table(struct mxt_data *data) |
1604 | { |
1605 | #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
1606 | video_unregister_device(&data->dbg.vdev); |
1607 | v4l2_device_unregister(&data->dbg.v4l2); |
1608 | #endif |
1609 | data->object_table = NULL; |
1610 | data->info = NULL; |
1611 | kfree(data->raw_info_block); |
1612 | data->raw_info_block = NULL; |
1613 | kfree(data->msg_buf); |
1614 | data->msg_buf = NULL; |
1615 | data->T5_address = 0; |
1616 | data->T5_msg_size = 0; |
1617 | data->T6_reportid = 0; |
1618 | data->T7_address = 0; |
1619 | data->T71_address = 0; |
1620 | data->T9_reportid_min = 0; |
1621 | data->T9_reportid_max = 0; |
1622 | data->T19_reportid = 0; |
1623 | data->T44_address = 0; |
1624 | data->T100_reportid_min = 0; |
1625 | data->T100_reportid_max = 0; |
1626 | data->max_reportid = 0; |
1627 | } |
1628 | |
1629 | static int mxt_parse_object_table(struct mxt_data *data, |
1630 | struct mxt_object *object_table) |
1631 | { |
1632 | struct i2c_client *client = data->client; |
1633 | int i; |
1634 | u8 reportid; |
1635 | u16 end_address; |
1636 | |
1637 | /* Valid Report IDs start counting from 1 */ |
1638 | reportid = 1; |
1639 | data->mem_size = 0; |
1640 | for (i = 0; i < data->info->object_num; i++) { |
1641 | struct mxt_object *object = object_table + i; |
1642 | u8 min_id, max_id; |
1643 | |
1644 | le16_to_cpus(&object->start_address); |
1645 | |
1646 | if (object->num_report_ids) { |
1647 | min_id = reportid; |
1648 | reportid += object->num_report_ids * |
1649 | mxt_obj_instances(object); |
1650 | max_id = reportid - 1; |
1651 | } else { |
1652 | min_id = 0; |
1653 | max_id = 0; |
1654 | } |
1655 | |
1656 | dev_dbg(&data->client->dev, |
1657 | "T%u Start:%u Size:%zu Instances:%zu Report IDs:%u-%u\n" , |
1658 | object->type, object->start_address, |
1659 | mxt_obj_size(object), mxt_obj_instances(object), |
1660 | min_id, max_id); |
1661 | |
1662 | switch (object->type) { |
1663 | case MXT_GEN_MESSAGE_T5: |
1664 | if (data->info->family_id == 0x80 && |
1665 | data->info->version < 0x20) { |
1666 | /* |
1667 | * On mXT224 firmware versions prior to V2.0 |
1668 | * read and discard unused CRC byte otherwise |
1669 | * DMA reads are misaligned. |
1670 | */ |
1671 | data->T5_msg_size = mxt_obj_size(object); |
1672 | } else { |
1673 | /* CRC not enabled, so skip last byte */ |
1674 | data->T5_msg_size = mxt_obj_size(object) - 1; |
1675 | } |
1676 | data->T5_address = object->start_address; |
1677 | break; |
1678 | case MXT_GEN_COMMAND_T6: |
1679 | data->T6_reportid = min_id; |
1680 | data->T6_address = object->start_address; |
1681 | break; |
1682 | case MXT_GEN_POWER_T7: |
1683 | data->T7_address = object->start_address; |
1684 | break; |
1685 | case MXT_SPT_DYNAMICCONFIGURATIONCONTAINER_T71: |
1686 | data->T71_address = object->start_address; |
1687 | break; |
1688 | case MXT_TOUCH_MULTI_T9: |
1689 | data->multitouch = MXT_TOUCH_MULTI_T9; |
1690 | /* Only handle messages from first T9 instance */ |
1691 | data->T9_reportid_min = min_id; |
1692 | data->T9_reportid_max = min_id + |
1693 | object->num_report_ids - 1; |
1694 | data->num_touchids = object->num_report_ids; |
1695 | break; |
1696 | case MXT_SPT_MESSAGECOUNT_T44: |
1697 | data->T44_address = object->start_address; |
1698 | break; |
1699 | case MXT_SPT_GPIOPWM_T19: |
1700 | data->T19_reportid = min_id; |
1701 | break; |
1702 | case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
1703 | data->multitouch = MXT_TOUCH_MULTITOUCHSCREEN_T100; |
1704 | data->T100_reportid_min = min_id; |
1705 | data->T100_reportid_max = max_id; |
1706 | /* first two report IDs reserved */ |
1707 | data->num_touchids = object->num_report_ids - 2; |
1708 | break; |
1709 | } |
1710 | |
1711 | end_address = object->start_address |
1712 | + mxt_obj_size(object) * mxt_obj_instances(object) - 1; |
1713 | |
1714 | if (end_address >= data->mem_size) |
1715 | data->mem_size = end_address + 1; |
1716 | } |
1717 | |
1718 | /* Store maximum reportid */ |
1719 | data->max_reportid = reportid; |
1720 | |
1721 | /* If T44 exists, T5 position has to be directly after */ |
1722 | if (data->T44_address && (data->T5_address != data->T44_address + 1)) { |
1723 | dev_err(&client->dev, "Invalid T44 position\n" ); |
1724 | return -EINVAL; |
1725 | } |
1726 | |
1727 | data->msg_buf = kcalloc(data->max_reportid, |
1728 | data->T5_msg_size, GFP_KERNEL); |
1729 | if (!data->msg_buf) |
1730 | return -ENOMEM; |
1731 | |
1732 | return 0; |
1733 | } |
1734 | |
1735 | static int mxt_read_info_block(struct mxt_data *data) |
1736 | { |
1737 | struct i2c_client *client = data->client; |
1738 | int error; |
1739 | size_t size; |
1740 | void *id_buf, *buf; |
1741 | uint8_t num_objects; |
1742 | u32 calculated_crc; |
1743 | u8 *crc_ptr; |
1744 | |
1745 | /* If info block already allocated, free it */ |
1746 | if (data->raw_info_block) |
1747 | mxt_free_object_table(data); |
1748 | |
1749 | /* Read 7-byte ID information block starting at address 0 */ |
1750 | size = sizeof(struct mxt_info); |
1751 | id_buf = kzalloc(size, GFP_KERNEL); |
1752 | if (!id_buf) |
1753 | return -ENOMEM; |
1754 | |
1755 | error = __mxt_read_reg(client, 0, size, id_buf); |
1756 | if (error) |
1757 | goto err_free_mem; |
1758 | |
1759 | /* Resize buffer to give space for rest of info block */ |
1760 | num_objects = ((struct mxt_info *)id_buf)->object_num; |
1761 | size += (num_objects * sizeof(struct mxt_object)) |
1762 | + MXT_INFO_CHECKSUM_SIZE; |
1763 | |
1764 | buf = krealloc(id_buf, size, GFP_KERNEL); |
1765 | if (!buf) { |
1766 | error = -ENOMEM; |
1767 | goto err_free_mem; |
1768 | } |
1769 | id_buf = buf; |
1770 | |
1771 | /* Read rest of info block */ |
1772 | error = __mxt_read_reg(client, MXT_OBJECT_START, |
1773 | size - MXT_OBJECT_START, |
1774 | id_buf + MXT_OBJECT_START); |
1775 | if (error) |
1776 | goto err_free_mem; |
1777 | |
1778 | /* Extract & calculate checksum */ |
1779 | crc_ptr = id_buf + size - MXT_INFO_CHECKSUM_SIZE; |
1780 | data->info_crc = crc_ptr[0] | (crc_ptr[1] << 8) | (crc_ptr[2] << 16); |
1781 | |
1782 | calculated_crc = mxt_calculate_crc(id_buf, 0, |
1783 | size - MXT_INFO_CHECKSUM_SIZE); |
1784 | |
1785 | /* |
1786 | * CRC mismatch can be caused by data corruption due to I2C comms |
1787 | * issue or else device is not using Object Based Protocol (eg i2c-hid) |
1788 | */ |
1789 | if ((data->info_crc == 0) || (data->info_crc != calculated_crc)) { |
1790 | dev_err(&client->dev, |
1791 | "Info Block CRC error calculated=0x%06X read=0x%06X\n" , |
1792 | calculated_crc, data->info_crc); |
1793 | error = -EIO; |
1794 | goto err_free_mem; |
1795 | } |
1796 | |
1797 | data->raw_info_block = id_buf; |
1798 | data->info = (struct mxt_info *)id_buf; |
1799 | |
1800 | dev_info(&client->dev, |
1801 | "Family: %u Variant: %u Firmware V%u.%u.%02X Objects: %u\n" , |
1802 | data->info->family_id, data->info->variant_id, |
1803 | data->info->version >> 4, data->info->version & 0xf, |
1804 | data->info->build, data->info->object_num); |
1805 | |
1806 | /* Parse object table information */ |
1807 | error = mxt_parse_object_table(data, id_buf + MXT_OBJECT_START); |
1808 | if (error) { |
1809 | dev_err(&client->dev, "Error %d parsing object table\n" , error); |
1810 | mxt_free_object_table(data); |
1811 | goto err_free_mem; |
1812 | } |
1813 | |
1814 | data->object_table = (struct mxt_object *)(id_buf + MXT_OBJECT_START); |
1815 | |
1816 | return 0; |
1817 | |
1818 | err_free_mem: |
1819 | kfree(id_buf); |
1820 | return error; |
1821 | } |
1822 | |
1823 | static int mxt_read_t9_resolution(struct mxt_data *data) |
1824 | { |
1825 | struct i2c_client *client = data->client; |
1826 | int error; |
1827 | struct t9_range range; |
1828 | unsigned char orient; |
1829 | struct mxt_object *object; |
1830 | |
1831 | object = mxt_get_object(data, MXT_TOUCH_MULTI_T9); |
1832 | if (!object) |
1833 | return -EINVAL; |
1834 | |
1835 | error = __mxt_read_reg(client, |
1836 | object->start_address + MXT_T9_XSIZE, |
1837 | sizeof(data->xsize), &data->xsize); |
1838 | if (error) |
1839 | return error; |
1840 | |
1841 | error = __mxt_read_reg(client, |
1842 | object->start_address + MXT_T9_YSIZE, |
1843 | sizeof(data->ysize), &data->ysize); |
1844 | if (error) |
1845 | return error; |
1846 | |
1847 | error = __mxt_read_reg(client, |
1848 | object->start_address + MXT_T9_RANGE, |
1849 | sizeof(range), &range); |
1850 | if (error) |
1851 | return error; |
1852 | |
1853 | data->max_x = get_unaligned_le16(&range.x); |
1854 | data->max_y = get_unaligned_le16(&range.y); |
1855 | |
1856 | error = __mxt_read_reg(client, |
1857 | object->start_address + MXT_T9_ORIENT, |
1858 | 1, &orient); |
1859 | if (error) |
1860 | return error; |
1861 | |
1862 | data->xy_switch = orient & MXT_T9_ORIENT_SWITCH; |
1863 | data->invertx = orient & MXT_T9_ORIENT_INVERTX; |
1864 | data->inverty = orient & MXT_T9_ORIENT_INVERTY; |
1865 | |
1866 | return 0; |
1867 | } |
1868 | |
1869 | static int mxt_read_t100_config(struct mxt_data *data) |
1870 | { |
1871 | struct i2c_client *client = data->client; |
1872 | int error; |
1873 | struct mxt_object *object; |
1874 | u16 range_x, range_y; |
1875 | u8 cfg, tchaux; |
1876 | u8 aux; |
1877 | |
1878 | object = mxt_get_object(data, MXT_TOUCH_MULTITOUCHSCREEN_T100); |
1879 | if (!object) |
1880 | return -EINVAL; |
1881 | |
1882 | /* read touchscreen dimensions */ |
1883 | error = __mxt_read_reg(client, |
1884 | object->start_address + MXT_T100_XRANGE, |
1885 | sizeof(range_x), &range_x); |
1886 | if (error) |
1887 | return error; |
1888 | |
1889 | data->max_x = get_unaligned_le16(&range_x); |
1890 | |
1891 | error = __mxt_read_reg(client, |
1892 | object->start_address + MXT_T100_YRANGE, |
1893 | sizeof(range_y), &range_y); |
1894 | if (error) |
1895 | return error; |
1896 | |
1897 | data->max_y = get_unaligned_le16(&range_y); |
1898 | |
1899 | error = __mxt_read_reg(client, |
1900 | object->start_address + MXT_T100_XSIZE, |
1901 | sizeof(data->xsize), &data->xsize); |
1902 | if (error) |
1903 | return error; |
1904 | |
1905 | error = __mxt_read_reg(client, |
1906 | object->start_address + MXT_T100_YSIZE, |
1907 | sizeof(data->ysize), &data->ysize); |
1908 | if (error) |
1909 | return error; |
1910 | |
1911 | /* read orientation config */ |
1912 | error = __mxt_read_reg(client, |
1913 | object->start_address + MXT_T100_CFG1, |
1914 | 1, &cfg); |
1915 | if (error) |
1916 | return error; |
1917 | |
1918 | data->xy_switch = cfg & MXT_T100_CFG_SWITCHXY; |
1919 | data->invertx = cfg & MXT_T100_CFG_INVERTX; |
1920 | data->inverty = cfg & MXT_T100_CFG_INVERTY; |
1921 | |
1922 | /* allocate aux bytes */ |
1923 | error = __mxt_read_reg(client, |
1924 | object->start_address + MXT_T100_TCHAUX, |
1925 | 1, &tchaux); |
1926 | if (error) |
1927 | return error; |
1928 | |
1929 | aux = 6; |
1930 | |
1931 | if (tchaux & MXT_T100_TCHAUX_VECT) |
1932 | data->t100_aux_vect = aux++; |
1933 | |
1934 | if (tchaux & MXT_T100_TCHAUX_AMPL) |
1935 | data->t100_aux_ampl = aux++; |
1936 | |
1937 | if (tchaux & MXT_T100_TCHAUX_AREA) |
1938 | data->t100_aux_area = aux++; |
1939 | |
1940 | dev_dbg(&client->dev, |
1941 | "T100 aux mappings vect:%u ampl:%u area:%u\n" , |
1942 | data->t100_aux_vect, data->t100_aux_ampl, data->t100_aux_area); |
1943 | |
1944 | return 0; |
1945 | } |
1946 | |
1947 | static int mxt_input_open(struct input_dev *dev); |
1948 | static void mxt_input_close(struct input_dev *dev); |
1949 | |
1950 | static void mxt_set_up_as_touchpad(struct input_dev *input_dev, |
1951 | struct mxt_data *data) |
1952 | { |
1953 | int i; |
1954 | |
1955 | input_dev->name = "Atmel maXTouch Touchpad" ; |
1956 | |
1957 | __set_bit(INPUT_PROP_BUTTONPAD, input_dev->propbit); |
1958 | |
1959 | input_abs_set_res(input_dev, ABS_X, MXT_PIXELS_PER_MM); |
1960 | input_abs_set_res(input_dev, ABS_Y, MXT_PIXELS_PER_MM); |
1961 | input_abs_set_res(input_dev, ABS_MT_POSITION_X, |
1962 | MXT_PIXELS_PER_MM); |
1963 | input_abs_set_res(input_dev, ABS_MT_POSITION_Y, |
1964 | MXT_PIXELS_PER_MM); |
1965 | |
1966 | for (i = 0; i < data->t19_num_keys; i++) |
1967 | if (data->t19_keymap[i] != KEY_RESERVED) |
1968 | input_set_capability(input_dev, EV_KEY, |
1969 | data->t19_keymap[i]); |
1970 | } |
1971 | |
1972 | static int mxt_initialize_input_device(struct mxt_data *data) |
1973 | { |
1974 | struct device *dev = &data->client->dev; |
1975 | struct input_dev *input_dev; |
1976 | int error; |
1977 | unsigned int num_mt_slots; |
1978 | unsigned int mt_flags = 0; |
1979 | |
1980 | switch (data->multitouch) { |
1981 | case MXT_TOUCH_MULTI_T9: |
1982 | num_mt_slots = data->T9_reportid_max - data->T9_reportid_min + 1; |
1983 | error = mxt_read_t9_resolution(data); |
1984 | if (error) |
1985 | dev_warn(dev, "Failed to initialize T9 resolution\n" ); |
1986 | break; |
1987 | |
1988 | case MXT_TOUCH_MULTITOUCHSCREEN_T100: |
1989 | num_mt_slots = data->num_touchids; |
1990 | error = mxt_read_t100_config(data); |
1991 | if (error) |
1992 | dev_warn(dev, "Failed to read T100 config\n" ); |
1993 | break; |
1994 | |
1995 | default: |
1996 | dev_err(dev, "Invalid multitouch object\n" ); |
1997 | return -EINVAL; |
1998 | } |
1999 | |
2000 | /* Handle default values and orientation switch */ |
2001 | if (data->max_x == 0) |
2002 | data->max_x = 1023; |
2003 | |
2004 | if (data->max_y == 0) |
2005 | data->max_y = 1023; |
2006 | |
2007 | if (data->xy_switch) |
2008 | swap(data->max_x, data->max_y); |
2009 | |
2010 | dev_info(dev, "Touchscreen size X%uY%u\n" , data->max_x, data->max_y); |
2011 | |
2012 | /* Register input device */ |
2013 | input_dev = input_allocate_device(); |
2014 | if (!input_dev) |
2015 | return -ENOMEM; |
2016 | |
2017 | input_dev->name = "Atmel maXTouch Touchscreen" ; |
2018 | input_dev->phys = data->phys; |
2019 | input_dev->id.bustype = BUS_I2C; |
2020 | input_dev->dev.parent = dev; |
2021 | input_dev->open = mxt_input_open; |
2022 | input_dev->close = mxt_input_close; |
2023 | |
2024 | input_set_capability(input_dev, EV_KEY, BTN_TOUCH); |
2025 | |
2026 | /* For single touch */ |
2027 | input_set_abs_params(input_dev, ABS_X, 0, data->max_x, 0, 0); |
2028 | input_set_abs_params(input_dev, ABS_Y, 0, data->max_y, 0, 0); |
2029 | |
2030 | if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
2031 | (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
2032 | data->t100_aux_ampl)) { |
2033 | input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); |
2034 | } |
2035 | |
2036 | /* If device has buttons we assume it is a touchpad */ |
2037 | if (data->t19_num_keys) { |
2038 | mxt_set_up_as_touchpad(input_dev, data); |
2039 | mt_flags |= INPUT_MT_POINTER; |
2040 | } else { |
2041 | mt_flags |= INPUT_MT_DIRECT; |
2042 | } |
2043 | |
2044 | /* For multi touch */ |
2045 | error = input_mt_init_slots(input_dev, num_mt_slots, mt_flags); |
2046 | if (error) { |
2047 | dev_err(dev, "Error %d initialising slots\n" , error); |
2048 | goto err_free_mem; |
2049 | } |
2050 | |
2051 | if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100) { |
2052 | input_set_abs_params(input_dev, ABS_MT_TOOL_TYPE, |
2053 | 0, MT_TOOL_MAX, 0, 0); |
2054 | input_set_abs_params(input_dev, ABS_MT_DISTANCE, |
2055 | MXT_DISTANCE_ACTIVE_TOUCH, |
2056 | MXT_DISTANCE_HOVERING, |
2057 | 0, 0); |
2058 | } |
2059 | |
2060 | input_set_abs_params(input_dev, ABS_MT_POSITION_X, |
2061 | 0, data->max_x, 0, 0); |
2062 | input_set_abs_params(input_dev, ABS_MT_POSITION_Y, |
2063 | 0, data->max_y, 0, 0); |
2064 | |
2065 | if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
2066 | (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
2067 | data->t100_aux_area)) { |
2068 | input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, |
2069 | 0, MXT_MAX_AREA, 0, 0); |
2070 | } |
2071 | |
2072 | if (data->multitouch == MXT_TOUCH_MULTI_T9 || |
2073 | (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
2074 | data->t100_aux_ampl)) { |
2075 | input_set_abs_params(input_dev, ABS_MT_PRESSURE, |
2076 | 0, 255, 0, 0); |
2077 | } |
2078 | |
2079 | if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
2080 | data->t100_aux_vect) { |
2081 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, |
2082 | 0, 255, 0, 0); |
2083 | } |
2084 | |
2085 | if (data->multitouch == MXT_TOUCH_MULTITOUCHSCREEN_T100 && |
2086 | data->t100_aux_vect) { |
2087 | input_set_abs_params(input_dev, ABS_MT_ORIENTATION, |
2088 | 0, 255, 0, 0); |
2089 | } |
2090 | |
2091 | input_set_drvdata(input_dev, data); |
2092 | |
2093 | error = input_register_device(input_dev); |
2094 | if (error) { |
2095 | dev_err(dev, "Error %d registering input device\n" , error); |
2096 | goto err_free_mem; |
2097 | } |
2098 | |
2099 | data->input_dev = input_dev; |
2100 | |
2101 | return 0; |
2102 | |
2103 | err_free_mem: |
2104 | input_free_device(input_dev); |
2105 | return error; |
2106 | } |
2107 | |
2108 | static int mxt_configure_objects(struct mxt_data *data, |
2109 | const struct firmware *cfg); |
2110 | |
2111 | static void mxt_config_cb(const struct firmware *cfg, void *ctx) |
2112 | { |
2113 | mxt_configure_objects(ctx, cfg); |
2114 | release_firmware(cfg); |
2115 | } |
2116 | |
2117 | static int mxt_initialize(struct mxt_data *data) |
2118 | { |
2119 | struct i2c_client *client = data->client; |
2120 | int recovery_attempts = 0; |
2121 | int error; |
2122 | |
2123 | while (1) { |
2124 | error = mxt_read_info_block(data); |
2125 | if (!error) |
2126 | break; |
2127 | |
2128 | /* Check bootloader state */ |
2129 | error = mxt_probe_bootloader(data, false); |
2130 | if (error) { |
2131 | dev_info(&client->dev, "Trying alternate bootloader address\n" ); |
2132 | error = mxt_probe_bootloader(data, true); |
2133 | if (error) { |
2134 | /* Chip is not in appmode or bootloader mode */ |
2135 | return error; |
2136 | } |
2137 | } |
2138 | |
2139 | /* OK, we are in bootloader, see if we can recover */ |
2140 | if (++recovery_attempts > 1) { |
2141 | dev_err(&client->dev, "Could not recover from bootloader mode\n" ); |
2142 | /* |
2143 | * We can reflash from this state, so do not |
2144 | * abort initialization. |
2145 | */ |
2146 | data->in_bootloader = true; |
2147 | return 0; |
2148 | } |
2149 | |
2150 | /* Attempt to exit bootloader into app mode */ |
2151 | mxt_send_bootloader_cmd(data, false); |
2152 | msleep(MXT_FW_RESET_TIME); |
2153 | } |
2154 | |
2155 | error = mxt_acquire_irq(data); |
2156 | if (error) |
2157 | return error; |
2158 | |
2159 | error = request_firmware_nowait(THIS_MODULE, true, MXT_CFG_NAME, |
2160 | &client->dev, GFP_KERNEL, data, |
2161 | mxt_config_cb); |
2162 | if (error) { |
2163 | dev_err(&client->dev, "Failed to invoke firmware loader: %d\n" , |
2164 | error); |
2165 | return error; |
2166 | } |
2167 | |
2168 | return 0; |
2169 | } |
2170 | |
2171 | static int mxt_set_t7_power_cfg(struct mxt_data *data, u8 sleep) |
2172 | { |
2173 | struct device *dev = &data->client->dev; |
2174 | int error; |
2175 | struct t7_config *new_config; |
2176 | struct t7_config deepsleep = { .active = 0, .idle = 0 }; |
2177 | |
2178 | if (sleep == MXT_POWER_CFG_DEEPSLEEP) |
2179 | new_config = &deepsleep; |
2180 | else |
2181 | new_config = &data->t7_cfg; |
2182 | |
2183 | error = __mxt_write_reg(data->client, data->T7_address, |
2184 | sizeof(data->t7_cfg), new_config); |
2185 | if (error) |
2186 | return error; |
2187 | |
2188 | dev_dbg(dev, "Set T7 ACTV:%d IDLE:%d\n" , |
2189 | new_config->active, new_config->idle); |
2190 | |
2191 | return 0; |
2192 | } |
2193 | |
2194 | static int mxt_init_t7_power_cfg(struct mxt_data *data) |
2195 | { |
2196 | struct device *dev = &data->client->dev; |
2197 | int error; |
2198 | bool retry = false; |
2199 | |
2200 | recheck: |
2201 | error = __mxt_read_reg(data->client, data->T7_address, |
2202 | sizeof(data->t7_cfg), &data->t7_cfg); |
2203 | if (error) |
2204 | return error; |
2205 | |
2206 | if (data->t7_cfg.active == 0 || data->t7_cfg.idle == 0) { |
2207 | if (!retry) { |
2208 | dev_dbg(dev, "T7 cfg zero, resetting\n" ); |
2209 | mxt_soft_reset(data); |
2210 | retry = true; |
2211 | goto recheck; |
2212 | } else { |
2213 | dev_dbg(dev, "T7 cfg zero after reset, overriding\n" ); |
2214 | data->t7_cfg.active = 20; |
2215 | data->t7_cfg.idle = 100; |
2216 | return mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); |
2217 | } |
2218 | } |
2219 | |
2220 | dev_dbg(dev, "Initialized power cfg: ACTV %d, IDLE %d\n" , |
2221 | data->t7_cfg.active, data->t7_cfg.idle); |
2222 | return 0; |
2223 | } |
2224 | |
2225 | #ifdef CONFIG_TOUCHSCREEN_ATMEL_MXT_T37 |
2226 | static u16 mxt_get_debug_value(struct mxt_data *data, unsigned int x, |
2227 | unsigned int y) |
2228 | { |
2229 | struct mxt_info *info = data->info; |
2230 | struct mxt_dbg *dbg = &data->dbg; |
2231 | unsigned int ofs, page; |
2232 | unsigned int col = 0; |
2233 | unsigned int col_width; |
2234 | |
2235 | if (info->family_id == MXT_FAMILY_1386) { |
2236 | col_width = info->matrix_ysize / MXT1386_COLUMNS; |
2237 | col = y / col_width; |
2238 | y = y % col_width; |
2239 | } else { |
2240 | col_width = info->matrix_ysize; |
2241 | } |
2242 | |
2243 | ofs = (y + (x * col_width)) * sizeof(u16); |
2244 | page = ofs / MXT_DIAGNOSTIC_SIZE; |
2245 | ofs %= MXT_DIAGNOSTIC_SIZE; |
2246 | |
2247 | if (info->family_id == MXT_FAMILY_1386) |
2248 | page += col * MXT1386_PAGES_PER_COLUMN; |
2249 | |
2250 | return get_unaligned_le16(&dbg->t37_buf[page].data[ofs]); |
2251 | } |
2252 | |
2253 | static int mxt_convert_debug_pages(struct mxt_data *data, u16 *outbuf) |
2254 | { |
2255 | struct mxt_dbg *dbg = &data->dbg; |
2256 | unsigned int x = 0; |
2257 | unsigned int y = 0; |
2258 | unsigned int i, rx, ry; |
2259 | |
2260 | for (i = 0; i < dbg->t37_nodes; i++) { |
2261 | /* Handle orientation */ |
2262 | rx = data->xy_switch ? y : x; |
2263 | ry = data->xy_switch ? x : y; |
2264 | rx = data->invertx ? (data->xsize - 1 - rx) : rx; |
2265 | ry = data->inverty ? (data->ysize - 1 - ry) : ry; |
2266 | |
2267 | outbuf[i] = mxt_get_debug_value(data, rx, ry); |
2268 | |
2269 | /* Next value */ |
2270 | if (++x >= (data->xy_switch ? data->ysize : data->xsize)) { |
2271 | x = 0; |
2272 | y++; |
2273 | } |
2274 | } |
2275 | |
2276 | return 0; |
2277 | } |
2278 | |
2279 | static int mxt_read_diagnostic_debug(struct mxt_data *data, u8 mode, |
2280 | u16 *outbuf) |
2281 | { |
2282 | struct mxt_dbg *dbg = &data->dbg; |
2283 | int retries = 0; |
2284 | int page; |
2285 | int ret; |
2286 | u8 cmd = mode; |
2287 | struct t37_debug *p; |
2288 | u8 cmd_poll; |
2289 | |
2290 | for (page = 0; page < dbg->t37_pages; page++) { |
2291 | p = dbg->t37_buf + page; |
2292 | |
2293 | ret = mxt_write_reg(data->client, dbg->diag_cmd_address, |
2294 | cmd); |
2295 | if (ret) |
2296 | return ret; |
2297 | |
2298 | retries = 0; |
2299 | msleep(20); |
2300 | wait_cmd: |
2301 | /* Read back command byte */ |
2302 | ret = __mxt_read_reg(data->client, dbg->diag_cmd_address, |
2303 | sizeof(cmd_poll), &cmd_poll); |
2304 | if (ret) |
2305 | return ret; |
2306 | |
2307 | /* Field is cleared once the command has been processed */ |
2308 | if (cmd_poll) { |
2309 | if (retries++ > 100) |
2310 | return -EINVAL; |
2311 | |
2312 | msleep(20); |
2313 | goto wait_cmd; |
2314 | } |
2315 | |
2316 | /* Read T37 page */ |
2317 | ret = __mxt_read_reg(data->client, dbg->t37_address, |
2318 | sizeof(struct t37_debug), p); |
2319 | if (ret) |
2320 | return ret; |
2321 | |
2322 | if (p->mode != mode || p->page != page) { |
2323 | dev_err(&data->client->dev, "T37 page mismatch\n" ); |
2324 | return -EINVAL; |
2325 | } |
2326 | |
2327 | dev_dbg(&data->client->dev, "%s page:%d retries:%d\n" , |
2328 | __func__, page, retries); |
2329 | |
2330 | /* For remaining pages, write PAGEUP rather than mode */ |
2331 | cmd = MXT_DIAGNOSTIC_PAGEUP; |
2332 | } |
2333 | |
2334 | return mxt_convert_debug_pages(data, outbuf); |
2335 | } |
2336 | |
2337 | static int mxt_queue_setup(struct vb2_queue *q, |
2338 | unsigned int *nbuffers, unsigned int *nplanes, |
2339 | unsigned int sizes[], struct device *alloc_devs[]) |
2340 | { |
2341 | struct mxt_data *data = q->drv_priv; |
2342 | size_t size = data->dbg.t37_nodes * sizeof(u16); |
2343 | |
2344 | if (*nplanes) |
2345 | return sizes[0] < size ? -EINVAL : 0; |
2346 | |
2347 | *nplanes = 1; |
2348 | sizes[0] = size; |
2349 | |
2350 | return 0; |
2351 | } |
2352 | |
2353 | static void mxt_buffer_queue(struct vb2_buffer *vb) |
2354 | { |
2355 | struct mxt_data *data = vb2_get_drv_priv(vb->vb2_queue); |
2356 | u16 *ptr; |
2357 | int ret; |
2358 | u8 mode; |
2359 | |
2360 | ptr = vb2_plane_vaddr(vb, 0); |
2361 | if (!ptr) { |
2362 | dev_err(&data->client->dev, "Error acquiring frame ptr\n" ); |
2363 | goto fault; |
2364 | } |
2365 | |
2366 | switch (data->dbg.input) { |
2367 | case MXT_V4L_INPUT_DELTAS: |
2368 | default: |
2369 | mode = MXT_DIAGNOSTIC_DELTAS; |
2370 | break; |
2371 | |
2372 | case MXT_V4L_INPUT_REFS: |
2373 | mode = MXT_DIAGNOSTIC_REFS; |
2374 | break; |
2375 | } |
2376 | |
2377 | ret = mxt_read_diagnostic_debug(data, mode, ptr); |
2378 | if (ret) |
2379 | goto fault; |
2380 | |
2381 | vb2_set_plane_payload(vb, 0, data->dbg.t37_nodes * sizeof(u16)); |
2382 | vb2_buffer_done(vb, VB2_BUF_STATE_DONE); |
2383 | return; |
2384 | |
2385 | fault: |
2386 | vb2_buffer_done(vb, VB2_BUF_STATE_ERROR); |
2387 | } |
2388 | |
2389 | /* V4L2 structures */ |
2390 | static const struct vb2_ops mxt_queue_ops = { |
2391 | .queue_setup = mxt_queue_setup, |
2392 | .buf_queue = mxt_buffer_queue, |
2393 | .wait_prepare = vb2_ops_wait_prepare, |
2394 | .wait_finish = vb2_ops_wait_finish, |
2395 | }; |
2396 | |
2397 | static const struct vb2_queue mxt_queue = { |
2398 | .type = V4L2_BUF_TYPE_VIDEO_CAPTURE, |
2399 | .io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ, |
2400 | .buf_struct_size = sizeof(struct mxt_vb2_buffer), |
2401 | .ops = &mxt_queue_ops, |
2402 | .mem_ops = &vb2_vmalloc_memops, |
2403 | .timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, |
2404 | .min_buffers_needed = 1, |
2405 | }; |
2406 | |
2407 | static int mxt_vidioc_querycap(struct file *file, void *priv, |
2408 | struct v4l2_capability *cap) |
2409 | { |
2410 | struct mxt_data *data = video_drvdata(file); |
2411 | |
2412 | strlcpy(cap->driver, "atmel_mxt_ts" , sizeof(cap->driver)); |
2413 | strlcpy(cap->card, "atmel_mxt_ts touch" , sizeof(cap->card)); |
2414 | snprintf(cap->bus_info, sizeof(cap->bus_info), |
2415 | "I2C:%s" , dev_name(&data->client->dev)); |
2416 | return 0; |
2417 | } |
2418 | |
2419 | static int mxt_vidioc_enum_input(struct file *file, void *priv, |
2420 | struct v4l2_input *i) |
2421 | { |
2422 | if (i->index >= MXT_V4L_INPUT_MAX) |
2423 | return -EINVAL; |
2424 | |
2425 | i->type = V4L2_INPUT_TYPE_TOUCH; |
2426 | |
2427 | switch (i->index) { |
2428 | case MXT_V4L_INPUT_REFS: |
2429 | strlcpy(i->name, "Mutual Capacitance References" , |
2430 | sizeof(i->name)); |
2431 | break; |
2432 | case MXT_V4L_INPUT_DELTAS: |
2433 | strlcpy(i->name, "Mutual Capacitance Deltas" , sizeof(i->name)); |
2434 | break; |
2435 | } |
2436 | |
2437 | return 0; |
2438 | } |
2439 | |
2440 | static int mxt_set_input(struct mxt_data *data, unsigned int i) |
2441 | { |
2442 | struct v4l2_pix_format *f = &data->dbg.format; |
2443 | |
2444 | if (i >= MXT_V4L_INPUT_MAX) |
2445 | return -EINVAL; |
2446 | |
2447 | if (i == MXT_V4L_INPUT_DELTAS) |
2448 | f->pixelformat = V4L2_TCH_FMT_DELTA_TD16; |
2449 | else |
2450 | f->pixelformat = V4L2_TCH_FMT_TU16; |
2451 | |
2452 | f->width = data->xy_switch ? data->ysize : data->xsize; |
2453 | f->height = data->xy_switch ? data->xsize : data->ysize; |
2454 | f->field = V4L2_FIELD_NONE; |
2455 | f->colorspace = V4L2_COLORSPACE_RAW; |
2456 | f->bytesperline = f->width * sizeof(u16); |
2457 | f->sizeimage = f->width * f->height * sizeof(u16); |
2458 | |
2459 | data->dbg.input = i; |
2460 | |
2461 | return 0; |
2462 | } |
2463 | |
2464 | static int mxt_vidioc_s_input(struct file *file, void *priv, unsigned int i) |
2465 | { |
2466 | return mxt_set_input(video_drvdata(file), i); |
2467 | } |
2468 | |
2469 | static int mxt_vidioc_g_input(struct file *file, void *priv, unsigned int *i) |
2470 | { |
2471 | struct mxt_data *data = video_drvdata(file); |
2472 | |
2473 | *i = data->dbg.input; |
2474 | |
2475 | return 0; |
2476 | } |
2477 | |
2478 | static int mxt_vidioc_fmt(struct file *file, void *priv, struct v4l2_format *f) |
2479 | { |
2480 | struct mxt_data *data = video_drvdata(file); |
2481 | |
2482 | f->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; |
2483 | f->fmt.pix = data->dbg.format; |
2484 | |
2485 | return 0; |
2486 | } |
2487 | |
2488 | static int mxt_vidioc_enum_fmt(struct file *file, void *priv, |
2489 | struct v4l2_fmtdesc *fmt) |
2490 | { |
2491 | if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
2492 | return -EINVAL; |
2493 | |
2494 | switch (fmt->index) { |
2495 | case 0: |
2496 | fmt->pixelformat = V4L2_TCH_FMT_TU16; |
2497 | break; |
2498 | |
2499 | case 1: |
2500 | fmt->pixelformat = V4L2_TCH_FMT_DELTA_TD16; |
2501 | break; |
2502 | |
2503 | default: |
2504 | return -EINVAL; |
2505 | } |
2506 | |
2507 | return 0; |
2508 | } |
2509 | |
2510 | static int mxt_vidioc_g_parm(struct file *file, void *fh, |
2511 | struct v4l2_streamparm *a) |
2512 | { |
2513 | if (a->type != V4L2_BUF_TYPE_VIDEO_CAPTURE) |
2514 | return -EINVAL; |
2515 | |
2516 | a->parm.capture.readbuffers = 1; |
2517 | a->parm.capture.timeperframe.numerator = 1; |
2518 | a->parm.capture.timeperframe.denominator = 10; |
2519 | return 0; |
2520 | } |
2521 | |
2522 | static const struct v4l2_ioctl_ops mxt_video_ioctl_ops = { |
2523 | .vidioc_querycap = mxt_vidioc_querycap, |
2524 | |
2525 | .vidioc_enum_fmt_vid_cap = mxt_vidioc_enum_fmt, |
2526 | .vidioc_s_fmt_vid_cap = mxt_vidioc_fmt, |
2527 | .vidioc_g_fmt_vid_cap = mxt_vidioc_fmt, |
2528 | .vidioc_try_fmt_vid_cap = mxt_vidioc_fmt, |
2529 | .vidioc_g_parm = mxt_vidioc_g_parm, |
2530 | |
2531 | .vidioc_enum_input = mxt_vidioc_enum_input, |
2532 | .vidioc_g_input = mxt_vidioc_g_input, |
2533 | .vidioc_s_input = mxt_vidioc_s_input, |
2534 | |
2535 | .vidioc_reqbufs = vb2_ioctl_reqbufs, |
2536 | .vidioc_create_bufs = vb2_ioctl_create_bufs, |
2537 | .vidioc_querybuf = vb2_ioctl_querybuf, |
2538 | .vidioc_qbuf = vb2_ioctl_qbuf, |
2539 | .vidioc_dqbuf = vb2_ioctl_dqbuf, |
2540 | .vidioc_expbuf = vb2_ioctl_expbuf, |
2541 | |
2542 | .vidioc_streamon = vb2_ioctl_streamon, |
2543 | .vidioc_streamoff = vb2_ioctl_streamoff, |
2544 | }; |
2545 | |
2546 | static const struct video_device mxt_video_device = { |
2547 | .name = "Atmel maxTouch" , |
2548 | .fops = &mxt_video_fops, |
2549 | .ioctl_ops = &mxt_video_ioctl_ops, |
2550 | .release = video_device_release_empty, |
2551 | .device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TOUCH | |
2552 | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING, |
2553 | }; |
2554 | |
2555 | static void mxt_debug_init(struct mxt_data *data) |
2556 | { |
2557 | struct mxt_info *info = data->info; |
2558 | struct mxt_dbg *dbg = &data->dbg; |
2559 | struct mxt_object *object; |
2560 | int error; |
2561 | |
2562 | object = mxt_get_object(data, MXT_GEN_COMMAND_T6); |
2563 | if (!object) |
2564 | goto error; |
2565 | |
2566 | dbg->diag_cmd_address = object->start_address + MXT_COMMAND_DIAGNOSTIC; |
2567 | |
2568 | object = mxt_get_object(data, MXT_DEBUG_DIAGNOSTIC_T37); |
2569 | if (!object) |
2570 | goto error; |
2571 | |
2572 | if (mxt_obj_size(object) != sizeof(struct t37_debug)) { |
2573 | dev_warn(&data->client->dev, "Bad T37 size" ); |
2574 | goto error; |
2575 | } |
2576 | |
2577 | dbg->t37_address = object->start_address; |
2578 | |
2579 | /* Calculate size of data and allocate buffer */ |
2580 | dbg->t37_nodes = data->xsize * data->ysize; |
2581 | |
2582 | if (info->family_id == MXT_FAMILY_1386) |
2583 | dbg->t37_pages = MXT1386_COLUMNS * MXT1386_PAGES_PER_COLUMN; |
2584 | else |
2585 | dbg->t37_pages = DIV_ROUND_UP(data->xsize * |
2586 | info->matrix_ysize * |
2587 | sizeof(u16), |
2588 | sizeof(dbg->t37_buf->data)); |
2589 | |
2590 | dbg->t37_buf = devm_kmalloc_array(&data->client->dev, dbg->t37_pages, |
2591 | sizeof(struct t37_debug), GFP_KERNEL); |
2592 | if (!dbg->t37_buf) |
2593 | goto error; |
2594 | |
2595 | /* init channel to zero */ |
2596 | mxt_set_input(data, 0); |
2597 | |
2598 | /* register video device */ |
2599 | snprintf(dbg->v4l2.name, sizeof(dbg->v4l2.name), "%s" , "atmel_mxt_ts" ); |
2600 | error = v4l2_device_register(&data->client->dev, &dbg->v4l2); |
2601 | if (error) |
2602 | goto error; |
2603 | |
2604 | /* initialize the queue */ |
2605 | mutex_init(&dbg->lock); |
2606 | dbg->queue = mxt_queue; |
2607 | dbg->queue.drv_priv = data; |
2608 | dbg->queue.lock = &dbg->lock; |
2609 | dbg->queue.dev = &data->client->dev; |
2610 | |
2611 | error = vb2_queue_init(&dbg->queue); |
2612 | if (error) |
2613 | goto error_unreg_v4l2; |
2614 | |
2615 | dbg->vdev = mxt_video_device; |
2616 | dbg->vdev.v4l2_dev = &dbg->v4l2; |
2617 | dbg->vdev.lock = &dbg->lock; |
2618 | dbg->vdev.vfl_dir = VFL_DIR_RX; |
2619 | dbg->vdev.queue = &dbg->queue; |
2620 | video_set_drvdata(&dbg->vdev, data); |
2621 | |
2622 | error = video_register_device(&dbg->vdev, VFL_TYPE_TOUCH, -1); |
2623 | if (error) |
2624 | goto error_unreg_v4l2; |
2625 | |
2626 | return; |
2627 | |
2628 | error_unreg_v4l2: |
2629 | v4l2_device_unregister(&dbg->v4l2); |
2630 | error: |
2631 | dev_warn(&data->client->dev, "Error initializing T37\n" ); |
2632 | } |
2633 | #else |
2634 | static void mxt_debug_init(struct mxt_data *data) |
2635 | { |
2636 | } |
2637 | #endif |
2638 | |
2639 | static int mxt_configure_objects(struct mxt_data *data, |
2640 | const struct firmware *cfg) |
2641 | { |
2642 | struct device *dev = &data->client->dev; |
2643 | int error; |
2644 | |
2645 | error = mxt_init_t7_power_cfg(data); |
2646 | if (error) { |
2647 | dev_err(dev, "Failed to initialize power cfg\n" ); |
2648 | return error; |
2649 | } |
2650 | |
2651 | if (cfg) { |
2652 | error = mxt_update_cfg(data, cfg); |
2653 | if (error) |
2654 | dev_warn(dev, "Error %d updating config\n" , error); |
2655 | } |
2656 | |
2657 | if (data->multitouch) { |
2658 | error = mxt_initialize_input_device(data); |
2659 | if (error) |
2660 | return error; |
2661 | } else { |
2662 | dev_warn(dev, "No touch object detected\n" ); |
2663 | } |
2664 | |
2665 | mxt_debug_init(data); |
2666 | |
2667 | return 0; |
2668 | } |
2669 | |
2670 | /* Firmware Version is returned as Major.Minor.Build */ |
2671 | static ssize_t mxt_fw_version_show(struct device *dev, |
2672 | struct device_attribute *attr, char *buf) |
2673 | { |
2674 | struct mxt_data *data = dev_get_drvdata(dev); |
2675 | struct mxt_info *info = data->info; |
2676 | return scnprintf(buf, PAGE_SIZE, "%u.%u.%02X\n" , |
2677 | info->version >> 4, info->version & 0xf, info->build); |
2678 | } |
2679 | |
2680 | /* Hardware Version is returned as FamilyID.VariantID */ |
2681 | static ssize_t mxt_hw_version_show(struct device *dev, |
2682 | struct device_attribute *attr, char *buf) |
2683 | { |
2684 | struct mxt_data *data = dev_get_drvdata(dev); |
2685 | struct mxt_info *info = data->info; |
2686 | return scnprintf(buf, PAGE_SIZE, "%u.%u\n" , |
2687 | info->family_id, info->variant_id); |
2688 | } |
2689 | |
2690 | static ssize_t mxt_show_instance(char *buf, int count, |
2691 | struct mxt_object *object, int instance, |
2692 | const u8 *val) |
2693 | { |
2694 | int i; |
2695 | |
2696 | if (mxt_obj_instances(object) > 1) |
2697 | count += scnprintf(buf + count, PAGE_SIZE - count, |
2698 | "Instance %u\n" , instance); |
2699 | |
2700 | for (i = 0; i < mxt_obj_size(object); i++) |
2701 | count += scnprintf(buf + count, PAGE_SIZE - count, |
2702 | "\t[%2u]: %02x (%d)\n" , i, val[i], val[i]); |
2703 | count += scnprintf(buf + count, PAGE_SIZE - count, "\n" ); |
2704 | |
2705 | return count; |
2706 | } |
2707 | |
2708 | static ssize_t mxt_object_show(struct device *dev, |
2709 | struct device_attribute *attr, char *buf) |
2710 | { |
2711 | struct mxt_data *data = dev_get_drvdata(dev); |
2712 | struct mxt_object *object; |
2713 | int count = 0; |
2714 | int i, j; |
2715 | int error; |
2716 | u8 *obuf; |
2717 | |
2718 | /* Pre-allocate buffer large enough to hold max sized object. */ |
2719 | obuf = kmalloc(256, GFP_KERNEL); |
2720 | if (!obuf) |
2721 | return -ENOMEM; |
2722 | |
2723 | error = 0; |
2724 | for (i = 0; i < data->info->object_num; i++) { |
2725 | object = data->object_table + i; |
2726 | |
2727 | if (!mxt_object_readable(object->type)) |
2728 | continue; |
2729 | |
2730 | count += scnprintf(buf + count, PAGE_SIZE - count, |
2731 | "T%u:\n" , object->type); |
2732 | |
2733 | for (j = 0; j < mxt_obj_instances(object); j++) { |
2734 | u16 size = mxt_obj_size(object); |
2735 | u16 addr = object->start_address + j * size; |
2736 | |
2737 | error = __mxt_read_reg(data->client, addr, size, obuf); |
2738 | if (error) |
2739 | goto done; |
2740 | |
2741 | count = mxt_show_instance(buf, count, object, j, obuf); |
2742 | } |
2743 | } |
2744 | |
2745 | done: |
2746 | kfree(obuf); |
2747 | return error ?: count; |
2748 | } |
2749 | |
2750 | static int mxt_check_firmware_format(struct device *dev, |
2751 | const struct firmware *fw) |
2752 | { |
2753 | unsigned int pos = 0; |
2754 | char c; |
2755 | |
2756 | while (pos < fw->size) { |
2757 | c = *(fw->data + pos); |
2758 | |
2759 | if (c < '0' || (c > '9' && c < 'A') || c > 'F') |
2760 | return 0; |
2761 | |
2762 | pos++; |
2763 | } |
2764 | |
2765 | /* |
2766 | * To convert file try: |
2767 | * xxd -r -p mXTXXX__APP_VX-X-XX.enc > maxtouch.fw |
2768 | */ |
2769 | dev_err(dev, "Aborting: firmware file must be in binary format\n" ); |
2770 | |
2771 | return -EINVAL; |
2772 | } |
2773 | |
2774 | static int mxt_load_fw(struct device *dev, const char *fn) |
2775 | { |
2776 | struct mxt_data *data = dev_get_drvdata(dev); |
2777 | const struct firmware *fw = NULL; |
2778 | unsigned int frame_size; |
2779 | unsigned int pos = 0; |
2780 | unsigned int retry = 0; |
2781 | unsigned int frame = 0; |
2782 | int ret; |
2783 | |
2784 | ret = request_firmware(&fw, fn, dev); |
2785 | if (ret) { |
2786 | dev_err(dev, "Unable to open firmware %s\n" , fn); |
2787 | return ret; |
2788 | } |
2789 | |
2790 | /* Check for incorrect enc file */ |
2791 | ret = mxt_check_firmware_format(dev, fw); |
2792 | if (ret) |
2793 | goto release_firmware; |
2794 | |
2795 | if (!data->in_bootloader) { |
2796 | /* Change to the bootloader mode */ |
2797 | data->in_bootloader = true; |
2798 | |
2799 | ret = mxt_t6_command(data, MXT_COMMAND_RESET, |
2800 | MXT_BOOT_VALUE, false); |
2801 | if (ret) |
2802 | goto release_firmware; |
2803 | |
2804 | msleep(MXT_RESET_TIME); |
2805 | |
2806 | /* Do not need to scan since we know family ID */ |
2807 | ret = mxt_lookup_bootloader_address(data, 0); |
2808 | if (ret) |
2809 | goto release_firmware; |
2810 | |
2811 | mxt_free_input_device(data); |
2812 | mxt_free_object_table(data); |
2813 | } else { |
2814 | enable_irq(data->irq); |
2815 | } |
2816 | |
2817 | reinit_completion(&data->bl_completion); |
2818 | |
2819 | ret = mxt_check_bootloader(data, MXT_WAITING_BOOTLOAD_CMD, false); |
2820 | if (ret) { |
2821 | /* Bootloader may still be unlocked from previous attempt */ |
2822 | ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, false); |
2823 | if (ret) |
2824 | goto disable_irq; |
2825 | } else { |
2826 | dev_info(dev, "Unlocking bootloader\n" ); |
2827 | |
2828 | /* Unlock bootloader */ |
2829 | ret = mxt_send_bootloader_cmd(data, true); |
2830 | if (ret) |
2831 | goto disable_irq; |
2832 | } |
2833 | |
2834 | while (pos < fw->size) { |
2835 | ret = mxt_check_bootloader(data, MXT_WAITING_FRAME_DATA, true); |
2836 | if (ret) |
2837 | goto disable_irq; |
2838 | |
2839 | frame_size = ((*(fw->data + pos) << 8) | *(fw->data + pos + 1)); |
2840 | |
2841 | /* Take account of CRC bytes */ |
2842 | frame_size += 2; |
2843 | |
2844 | /* Write one frame to device */ |
2845 | ret = mxt_bootloader_write(data, fw->data + pos, frame_size); |
2846 | if (ret) |
2847 | goto disable_irq; |
2848 | |
2849 | ret = mxt_check_bootloader(data, MXT_FRAME_CRC_PASS, true); |
2850 | if (ret) { |
2851 | retry++; |
2852 | |
2853 | /* Back off by 20ms per retry */ |
2854 | msleep(retry * 20); |
2855 | |
2856 | if (retry > 20) { |
2857 | dev_err(dev, "Retry count exceeded\n" ); |
2858 | goto disable_irq; |
2859 | } |
2860 | } else { |
2861 | retry = 0; |
2862 | pos += frame_size; |
2863 | frame++; |
2864 | } |
2865 | |
2866 | if (frame % 50 == 0) |
2867 | dev_dbg(dev, "Sent %d frames, %d/%zd bytes\n" , |
2868 | frame, pos, fw->size); |
2869 | } |
2870 | |
2871 | /* Wait for flash. */ |
2872 | ret = mxt_wait_for_completion(data, &data->bl_completion, |
2873 | MXT_FW_RESET_TIME); |
2874 | if (ret) |
2875 | goto disable_irq; |
2876 | |
2877 | dev_dbg(dev, "Sent %d frames, %d bytes\n" , frame, pos); |
2878 | |
2879 | /* |
2880 | * Wait for device to reset. Some bootloader versions do not assert |
2881 | * the CHG line after bootloading has finished, so ignore potential |
2882 | * errors. |
2883 | */ |
2884 | mxt_wait_for_completion(data, &data->bl_completion, MXT_FW_RESET_TIME); |
2885 | |
2886 | data->in_bootloader = false; |
2887 | |
2888 | disable_irq: |
2889 | disable_irq(data->irq); |
2890 | release_firmware: |
2891 | release_firmware(fw); |
2892 | return ret; |
2893 | } |
2894 | |
2895 | static ssize_t mxt_update_fw_store(struct device *dev, |
2896 | struct device_attribute *attr, |
2897 | const char *buf, size_t count) |
2898 | { |
2899 | struct mxt_data *data = dev_get_drvdata(dev); |
2900 | int error; |
2901 | |
2902 | error = mxt_load_fw(dev, MXT_FW_NAME); |
2903 | if (error) { |
2904 | dev_err(dev, "The firmware update failed(%d)\n" , error); |
2905 | count = error; |
2906 | } else { |
2907 | dev_info(dev, "The firmware update succeeded\n" ); |
2908 | |
2909 | error = mxt_initialize(data); |
2910 | if (error) |
2911 | return error; |
2912 | } |
2913 | |
2914 | return count; |
2915 | } |
2916 | |
2917 | static DEVICE_ATTR(fw_version, S_IRUGO, mxt_fw_version_show, NULL); |
2918 | static DEVICE_ATTR(hw_version, S_IRUGO, mxt_hw_version_show, NULL); |
2919 | static DEVICE_ATTR(object, S_IRUGO, mxt_object_show, NULL); |
2920 | static DEVICE_ATTR(update_fw, S_IWUSR, NULL, mxt_update_fw_store); |
2921 | |
2922 | static struct attribute *mxt_attrs[] = { |
2923 | &dev_attr_fw_version.attr, |
2924 | &dev_attr_hw_version.attr, |
2925 | &dev_attr_object.attr, |
2926 | &dev_attr_update_fw.attr, |
2927 | NULL |
2928 | }; |
2929 | |
2930 | static const struct attribute_group mxt_attr_group = { |
2931 | .attrs = mxt_attrs, |
2932 | }; |
2933 | |
2934 | static void mxt_start(struct mxt_data *data) |
2935 | { |
2936 | switch (data->suspend_mode) { |
2937 | case MXT_SUSPEND_T9_CTRL: |
2938 | mxt_soft_reset(data); |
2939 | |
2940 | /* Touch enable */ |
2941 | /* 0x83 = SCANEN | RPTEN | ENABLE */ |
2942 | mxt_write_object(data, |
2943 | MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0x83); |
2944 | break; |
2945 | |
2946 | case MXT_SUSPEND_DEEP_SLEEP: |
2947 | default: |
2948 | mxt_set_t7_power_cfg(data, MXT_POWER_CFG_RUN); |
2949 | |
2950 | /* Recalibrate since chip has been in deep sleep */ |
2951 | mxt_t6_command(data, MXT_COMMAND_CALIBRATE, 1, false); |
2952 | break; |
2953 | } |
2954 | } |
2955 | |
2956 | static void mxt_stop(struct mxt_data *data) |
2957 | { |
2958 | switch (data->suspend_mode) { |
2959 | case MXT_SUSPEND_T9_CTRL: |
2960 | /* Touch disable */ |
2961 | mxt_write_object(data, |
2962 | MXT_TOUCH_MULTI_T9, MXT_T9_CTRL, 0); |
2963 | break; |
2964 | |
2965 | case MXT_SUSPEND_DEEP_SLEEP: |
2966 | default: |
2967 | mxt_set_t7_power_cfg(data, MXT_POWER_CFG_DEEPSLEEP); |
2968 | break; |
2969 | } |
2970 | } |
2971 | |
2972 | static int mxt_input_open(struct input_dev *dev) |
2973 | { |
2974 | struct mxt_data *data = input_get_drvdata(dev); |
2975 | |
2976 | mxt_start(data); |
2977 | |
2978 | return 0; |
2979 | } |
2980 | |
2981 | static void mxt_input_close(struct input_dev *dev) |
2982 | { |
2983 | struct mxt_data *data = input_get_drvdata(dev); |
2984 | |
2985 | mxt_stop(data); |
2986 | } |
2987 | |
2988 | static int mxt_parse_device_properties(struct mxt_data *data) |
2989 | { |
2990 | static const char keymap_property[] = "linux,gpio-keymap" ; |
2991 | struct device *dev = &data->client->dev; |
2992 | u32 *keymap; |
2993 | int n_keys; |
2994 | int error; |
2995 | |
2996 | if (device_property_present(dev, keymap_property)) { |
2997 | n_keys = device_property_read_u32_array(dev, keymap_property, |
2998 | NULL, 0); |
2999 | if (n_keys <= 0) { |
3000 | error = n_keys < 0 ? n_keys : -EINVAL; |
3001 | dev_err(dev, "invalid/malformed '%s' property: %d\n" , |
3002 | keymap_property, error); |
3003 | return error; |
3004 | } |
3005 | |
3006 | keymap = devm_kmalloc_array(dev, n_keys, sizeof(*keymap), |
3007 | GFP_KERNEL); |
3008 | if (!keymap) |
3009 | return -ENOMEM; |
3010 | |
3011 | error = device_property_read_u32_array(dev, keymap_property, |
3012 | keymap, n_keys); |
3013 | if (error) { |
3014 | dev_err(dev, "failed to parse '%s' property: %d\n" , |
3015 | keymap_property, error); |
3016 | return error; |
3017 | } |
3018 | |
3019 | data->t19_keymap = keymap; |
3020 | data->t19_num_keys = n_keys; |
3021 | } |
3022 | |
3023 | return 0; |
3024 | } |
3025 | |
3026 | static const struct dmi_system_id chromebook_T9_suspend_dmi[] = { |
3027 | { |
3028 | .matches = { |
3029 | DMI_MATCH(DMI_SYS_VENDOR, "GOOGLE" ), |
3030 | DMI_MATCH(DMI_PRODUCT_NAME, "Link" ), |
3031 | }, |
3032 | }, |
3033 | { |
3034 | .matches = { |
3035 | DMI_MATCH(DMI_PRODUCT_NAME, "Peppy" ), |
3036 | }, |
3037 | }, |
3038 | { } |
3039 | }; |
3040 | |
3041 | static int mxt_probe(struct i2c_client *client, const struct i2c_device_id *id) |
3042 | { |
3043 | struct mxt_data *data; |
3044 | int error; |
3045 | |
3046 | /* |
3047 | * Ignore devices that do not have device properties attached to |
3048 | * them, as we need help determining whether we are dealing with |
3049 | * touch screen or touchpad. |
3050 | * |
3051 | * So far on x86 the only users of Atmel touch controllers are |
3052 | * Chromebooks, and chromeos_laptop driver will ensure that |
3053 | * necessary properties are provided (if firmware does not do that). |
3054 | */ |
3055 | if (!device_property_present(&client->dev, "compatible" )) |
3056 | return -ENXIO; |
3057 | |
3058 | /* |
3059 | * Ignore ACPI devices representing bootloader mode. |
3060 | * |
3061 | * This is a bit of a hack: Google Chromebook BIOS creates ACPI |
3062 | * devices for both application and bootloader modes, but we are |
3063 | * interested in application mode only (if device is in bootloader |
3064 | * mode we'll end up switching into application anyway). So far |
3065 | * application mode addresses were all above 0x40, so we'll use it |
3066 | * as a threshold. |
3067 | */ |
3068 | if (ACPI_COMPANION(&client->dev) && client->addr < 0x40) |
3069 | return -ENXIO; |
3070 | |
3071 | data = devm_kzalloc(&client->dev, sizeof(struct mxt_data), GFP_KERNEL); |
3072 | if (!data) |
3073 | return -ENOMEM; |
3074 | |
3075 | snprintf(data->phys, sizeof(data->phys), "i2c-%u-%04x/input0" , |
3076 | client->adapter->nr, client->addr); |
3077 | |
3078 | data->client = client; |
3079 | data->irq = client->irq; |
3080 | i2c_set_clientdata(client, data); |
3081 | |
3082 | init_completion(&data->bl_completion); |
3083 | init_completion(&data->reset_completion); |
3084 | init_completion(&data->crc_completion); |
3085 | |
3086 | data->suspend_mode = dmi_check_system(chromebook_T9_suspend_dmi) ? |
3087 | MXT_SUSPEND_T9_CTRL : MXT_SUSPEND_DEEP_SLEEP; |
3088 | |
3089 | error = mxt_parse_device_properties(data); |
3090 | if (error) |
3091 | return error; |
3092 | |
3093 | data->reset_gpio = devm_gpiod_get_optional(&client->dev, |
3094 | "reset" , GPIOD_OUT_LOW); |
3095 | if (IS_ERR(data->reset_gpio)) { |
3096 | error = PTR_ERR(data->reset_gpio); |
3097 | dev_err(&client->dev, "Failed to get reset gpio: %d\n" , error); |
3098 | return error; |
3099 | } |
3100 | |
3101 | error = devm_request_threaded_irq(&client->dev, client->irq, |
3102 | NULL, mxt_interrupt, IRQF_ONESHOT, |
3103 | client->name, data); |
3104 | if (error) { |
3105 | dev_err(&client->dev, "Failed to register interrupt\n" ); |
3106 | return error; |
3107 | } |
3108 | |
3109 | disable_irq(client->irq); |
3110 | |
3111 | if (data->reset_gpio) { |
3112 | msleep(MXT_RESET_GPIO_TIME); |
3113 | gpiod_set_value(data->reset_gpio, 1); |
3114 | msleep(MXT_RESET_INVALID_CHG); |
3115 | } |
3116 | |
3117 | error = mxt_initialize(data); |
3118 | if (error) |
3119 | return error; |
3120 | |
3121 | error = sysfs_create_group(&client->dev.kobj, &mxt_attr_group); |
3122 | if (error) { |
3123 | dev_err(&client->dev, "Failure %d creating sysfs group\n" , |
3124 | error); |
3125 | goto err_free_object; |
3126 | } |
3127 | |
3128 | return 0; |
3129 | |
3130 | err_free_object: |
3131 | mxt_free_input_device(data); |
3132 | mxt_free_object_table(data); |
3133 | return error; |
3134 | } |
3135 | |
3136 | static int mxt_remove(struct i2c_client *client) |
3137 | { |
3138 | struct mxt_data *data = i2c_get_clientdata(client); |
3139 | |
3140 | disable_irq(data->irq); |
3141 | sysfs_remove_group(&client->dev.kobj, &mxt_attr_group); |
3142 | mxt_free_input_device(data); |
3143 | mxt_free_object_table(data); |
3144 | |
3145 | return 0; |
3146 | } |
3147 | |
3148 | static int __maybe_unused mxt_suspend(struct device *dev) |
3149 | { |
3150 | struct i2c_client *client = to_i2c_client(dev); |
3151 | struct mxt_data *data = i2c_get_clientdata(client); |
3152 | struct input_dev *input_dev = data->input_dev; |
3153 | |
3154 | if (!input_dev) |
3155 | return 0; |
3156 | |
3157 | mutex_lock(&input_dev->mutex); |
3158 | |
3159 | if (input_dev->users) |
3160 | mxt_stop(data); |
3161 | |
3162 | mutex_unlock(&input_dev->mutex); |
3163 | |
3164 | return 0; |
3165 | } |
3166 | |
3167 | static int __maybe_unused mxt_resume(struct device *dev) |
3168 | { |
3169 | struct i2c_client *client = to_i2c_client(dev); |
3170 | struct mxt_data *data = i2c_get_clientdata(client); |
3171 | struct input_dev *input_dev = data->input_dev; |
3172 | |
3173 | if (!input_dev) |
3174 | return 0; |
3175 | |
3176 | mutex_lock(&input_dev->mutex); |
3177 | |
3178 | if (input_dev->users) |
3179 | mxt_start(data); |
3180 | |
3181 | mutex_unlock(&input_dev->mutex); |
3182 | |
3183 | return 0; |
3184 | } |
3185 | |
3186 | static SIMPLE_DEV_PM_OPS(mxt_pm_ops, mxt_suspend, mxt_resume); |
3187 | |
3188 | static const struct of_device_id mxt_of_match[] = { |
3189 | { .compatible = "atmel,maxtouch" , }, |
3190 | /* Compatibles listed below are deprecated */ |
3191 | { .compatible = "atmel,qt602240_ts" , }, |
3192 | { .compatible = "atmel,atmel_mxt_ts" , }, |
3193 | { .compatible = "atmel,atmel_mxt_tp" , }, |
3194 | { .compatible = "atmel,mXT224" , }, |
3195 | {}, |
3196 | }; |
3197 | MODULE_DEVICE_TABLE(of, mxt_of_match); |
3198 | |
3199 | #ifdef CONFIG_ACPI |
3200 | static const struct acpi_device_id mxt_acpi_id[] = { |
3201 | { "ATML0000" , 0 }, /* Touchpad */ |
3202 | { "ATML0001" , 0 }, /* Touchscreen */ |
3203 | { } |
3204 | }; |
3205 | MODULE_DEVICE_TABLE(acpi, mxt_acpi_id); |
3206 | #endif |
3207 | |
3208 | static const struct i2c_device_id mxt_id[] = { |
3209 | { "qt602240_ts" , 0 }, |
3210 | { "atmel_mxt_ts" , 0 }, |
3211 | { "atmel_mxt_tp" , 0 }, |
3212 | { "maxtouch" , 0 }, |
3213 | { "mXT224" , 0 }, |
3214 | { } |
3215 | }; |
3216 | MODULE_DEVICE_TABLE(i2c, mxt_id); |
3217 | |
3218 | static struct i2c_driver mxt_driver = { |
3219 | .driver = { |
3220 | .name = "atmel_mxt_ts" , |
3221 | .of_match_table = mxt_of_match, |
3222 | .acpi_match_table = ACPI_PTR(mxt_acpi_id), |
3223 | .pm = &mxt_pm_ops, |
3224 | }, |
3225 | .probe = mxt_probe, |
3226 | .remove = mxt_remove, |
3227 | .id_table = mxt_id, |
3228 | }; |
3229 | |
3230 | module_i2c_driver(mxt_driver); |
3231 | |
3232 | /* Module information */ |
3233 | MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>" ); |
3234 | MODULE_DESCRIPTION("Atmel maXTouch Touchscreen driver" ); |
3235 | MODULE_LICENSE("GPL" ); |
3236 | |